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Tutorial: Memuat data ke kumpulan SQL Azure Synapse Analytics

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Tutorial ini menggunakan PolyBase untuk memuat gudang data WideWorldImportersDW dari penyimpanan Blob Azure ke gudang data Anda di kumpulan SQL Azure Synapse Analytics. Tutorial menggunakan portal Microsoft Azure dan SQL Server Management Studio (SSMS) untuk:

  • Buat pengguna yang ditunjuk untuk memuat data
  • Membuat tabel eksternal yang menggunakan blob Azure sebagai sumber data
  • Menggunakan pernyataan T-SQL CTAS untuk memuat data ke gudang data Anda
  • Menampilkan kemajuan data saat sedang dimuat
  • Menghasilkan data satu tahun dalam dimensi tanggal dan tabel fakta penjualan
  • Membuat statistik pada data yang baru dimuat

Jika tidak memiliki langganan Azure, buat akun Azure gratis sebelum Anda memulai.

Sebelum Anda mulai

Sebelum Anda memulai tutorial ini, unduh dan instal versi terbaru dari SQL Server Management Studio (SSMS).

Tutorial ini mengasumsikan Anda telah membuat kumpulan khusus SQL dari tutorial berikut.

Catatan

Sebaiknya Anda menggunakan setidaknya DW1000c untuk tutorial ini.

Buat pengguna untuk memuat data

Akun administrator server digunakan untuk melakukan operasi manajemen, dan tidak cocok untuk menjalankan kueri pada data pengguna. Memuat data adalah operasi intensif memori. Maksimum memori didefinisikan sesuai dengan Generasi kumpulan SQL yang Anda gunakan, unit gudang data, dan kelas sumber daya.

Yang terbaik adalah dengan membuat info masuk dan pengguna yang didedikasikan untuk memuat data. Kemudian tambahkan pengguna pemuatan ke kelas sumber daya yang memungkinkan alokasi memori maksimum yang sesuai.

Karena saat ini Anda tersambung sebagai admin server, Anda dapat membuat info masuk dan pengguna. Gunakan langkah-langkah ini untuk membuat info masuk dan pengguna yang disebut LoaderRC60. Kemudian tetapkan pengguna ke kelas sumber daya staticrc60.

  1. Di SQL Server Management Studio, klik kanan master untuk menunjukkan daftar menurun, dan pilih Kueri Baru. Jendela kueri baru terbuka.

    Kueri baru dalam master

  2. Di jendela kueri, masukkan perintah T-SQL ini untuk membuat info masuk dan pengguna bernama LoaderRC60, mensubtitusi kata sandi Anda sendiri untuk 'a123STRONGpassword!'.

    CREATE LOGIN LoaderRC60 WITH PASSWORD = 'a123STRONGpassword!';
CREATE USER LoaderRC60 FOR LOGIN LoaderRC60;

  3. Klik Eksekusi.

  4. Klik kanan SampleDW, dan pilih Kueri Baru. Jendela kueri baru terbuka.

    Kueri baru tentang sampel gudang data

  5. Masukkan perintah T-SQL berikut untuk membuat pengguna database bernama LoaderRC60 untuk info masuk LoaderRC60. Baris kedua memberi pengguna baru izin CONTROL pada gudang data baru. Izin ini mirip dengan menjadikan pengguna sebagai pemilik database. Baris ketiga menambahkan pengguna baru sebagai anggota staticrc60 kelas sumber daya.

    CREATE USER LoaderRC60 FOR LOGIN LoaderRC60;
GRANT CONTROL ON DATABASE::[SampleDW] to LoaderRC60;
EXEC sp_addrolemember 'staticrc60', 'LoaderRC60';

  6. Klik Eksekusi.

Sambungkan ke server sebagai pengguna pemuatan

Langkah pertama menuju memuat data adalah masuk sebagai LoaderRC60.

  1. Di Object Explorer, klik menu menurun Sambungkan dan pilih Mesin Database. Kotak dialog Sambungkan ke Server akan muncul.

    Terhubung dengan info masuk baru

  2. Masukkan nama server yang sepenuhnya memenuhi syarat, dan masukkan LoaderRC60 sebagai Info Masuk. Masukkan kata sandi Anda untuk LoaderRC60.

  3. Klik Sambungkan.

  4. Saat koneksi siap, Anda akan melihat dua koneksi server di Object Explorer. Satu koneksi sebagai ServerAdmin dan satu koneksi sebagai LoaderRC60.

    Koneksi berhasil

Membuat tabel dan objek eksternal

Anda siap untuk memulai proses pemuatan data ke gudang data baru Anda. Untuk referensi di masa mendatang, untuk mempelajari cara memasukkan data Anda ke penyimpanan Blob Azure atau memuatnya langsung dari sumber ke kumpulan SQL, lihat ringkasan pemuatan.

Jalankan skrip SQL berikut untuk menentukan informasi tentang data yang ingin Anda muat. Informasi ini mencakup tempat data berada, format konten data, dan definisi tabel untuk data. Data ini terletak di Blob Azure global.

  1. Di bagian sebelumnya, Anda masuk ke gudang data sebagai LoaderRC60. Di SQL Server Management Studio, klik kanan SampleDW di bawah koneksi LoaderRC60 Anda dan pilih Kueri Baru. Jendela kueri baru muncul.

    Jendela kueri pemuatan baru

  2. Bandingkan jendela kueri Anda dengan gambar sebelumnya. Verifikasi bahwa jendela kueri baru Anda berjalan sebagai LoaderRC60 dan melakukan kueri pada database SampleDW. Gunakan jendela kueri ini untuk melakukan semua langkah pemuatan.

  3. Membuat kunci master untuk database SampleDW. Anda hanya perlu membuat kunci master sekali per database.

    CREATE MASTER KEY;

  4. Jalankan pernyataan CREATE EXTERNAL DATA SOURCE berikut ini untuk menentukan lokasi blob Azure. Ini adalah lokasi data pengimpor eksternal di seluruh dunia. Untuk menjalankan perintah yang telah Anda tambahkan ke jendela kueri, sorot perintah yang ingin Anda jalankan dan klik Jalankan.

    CREATE EXTERNAL DATA SOURCE WWIStorage
WITH
(
    TYPE = Hadoop,
    LOCATION = 'wasbs://wideworldimporters@sqldwholdata.blob.core.windows.net'
);

  5. Jalankan pernyataan T-SQL berikut CREATE EXTERNAL FILE FORMAT untuk menentukan karakteristik pemformatan dan opsi untuk file data eksternal. Pernyataan ini menentukan data eksternal disimpan sebagai teks dan nilai dipisahkan oleh karakter pipa ('|').

    CREATE EXTERNAL FILE FORMAT TextFileFormat
WITH
(
    FORMAT_TYPE = DELIMITEDTEXT,
    FORMAT_OPTIONS
    (
        FIELD_TERMINATOR = '|',
        USE_TYPE_DEFAULT = FALSE
    )
);

  6. Jalankan pernyataan CREATE SCHEMA berikut untuk membuat skema sebagai format file eksternal Anda. Skema ext memberikan cara untuk mengatur tabel eksternal yang akan Anda buat. Skema wwi mengatur tabel standar yang akan berisi data.

    CREATE SCHEMA ext;
GO
CREATE SCHEMA wwi;

  7. Membuat tabel eksternal. Definisi tabel disimpan dalam database, tetapi tabel mereferensikan data yang disimpan dalam penyimpanan blob Azure. Jalankan perintah T-SQL berikut ini untuk membuat beberapa tabel eksternal yang semuanya menunjuk ke blob Azure yang Anda tentukan sebelumnya di sumber data eksternal.

    CREATE EXTERNAL TABLE [ext].[dimension_City](
    [City Key] [int] NOT NULL,
    [WWI City ID] [int] NOT NULL,
    [City] [nvarchar](50) NOT NULL,
    [State Province] [nvarchar](50) NOT NULL,
    [Country] [nvarchar](60) NOT NULL,
    [Continent] [nvarchar](30) NOT NULL,
    [Sales Territory] [nvarchar](50) NOT NULL,
    [Region] [nvarchar](30) NOT NULL,
    [Subregion] [nvarchar](30) NOT NULL,
    [Location] [nvarchar](76) NULL,
    [Latest Recorded Population] [bigint] NOT NULL,
    [Valid From] [datetime2](7) NOT NULL,
    [Valid To] [datetime2](7) NOT NULL,
    [Lineage Key] [int] NOT NULL
)
WITH (LOCATION='/v1/dimension_City/',
    DATA_SOURCE = WWIStorage,  
    FILE_FORMAT = TextFileFormat,
    REJECT_TYPE = VALUE,
    REJECT_VALUE = 0
);  
CREATE EXTERNAL TABLE [ext].[dimension_Customer] (
    [Customer Key] [int] NOT NULL,
    [WWI Customer ID] [int] NOT NULL,
    [Customer] [nvarchar](100) NOT NULL,
    [Bill To Customer] [nvarchar](100) NOT NULL,
       [Category] [nvarchar](50) NOT NULL,
    [Buying Group] [nvarchar](50) NOT NULL,
    [Primary Contact] [nvarchar](50) NOT NULL,
    [Postal Code] [nvarchar](10) NOT NULL,
    [Valid From] [datetime2](7) NOT NULL,
    [Valid To] [datetime2](7) NOT NULL,
    [Lineage Key] [int] NOT NULL
)
WITH (LOCATION='/v1/dimension_Customer/',
    DATA_SOURCE = WWIStorage,  
    FILE_FORMAT = TextFileFormat,
    REJECT_TYPE = VALUE,
    REJECT_VALUE = 0
);  
CREATE EXTERNAL TABLE [ext].[dimension_Employee] (
    [Employee Key] [int] NOT NULL,
    [WWI Employee ID] [int] NOT NULL,
    [Employee] [nvarchar](50) NOT NULL,
    [Preferred Name] [nvarchar](50) NOT NULL,
    [Is Salesperson] [bit] NOT NULL,
    [Photo] [varbinary](300) NULL,
    [Valid From] [datetime2](7) NOT NULL,
    [Valid To] [datetime2](7) NOT NULL,
    [Lineage Key] [int] NOT NULL
)
WITH ( LOCATION='/v1/dimension_Employee/',
    DATA_SOURCE = WWIStorage,  
    FILE_FORMAT = TextFileFormat,
    REJECT_TYPE = VALUE,
    REJECT_VALUE = 0
);
CREATE EXTERNAL TABLE [ext].[dimension_PaymentMethod] (
    [Payment Method Key] [int] NOT NULL,
    [WWI Payment Method ID] [int] NOT NULL,
    [Payment Method] [nvarchar](50) NOT NULL,
    [Valid From] [datetime2](7) NOT NULL,
    [Valid To] [datetime2](7) NOT NULL,
    [Lineage Key] [int] NOT NULL
)
WITH ( LOCATION ='/v1/dimension_PaymentMethod/',
    DATA_SOURCE = WWIStorage,  
    FILE_FORMAT = TextFileFormat,
    REJECT_TYPE = VALUE,
    REJECT_VALUE = 0
);
CREATE EXTERNAL TABLE [ext].[dimension_StockItem](
    [Stock Item Key] [int] NOT NULL,
    [WWI Stock Item ID] [int] NOT NULL,
    [Stock Item] [nvarchar](100) NOT NULL,
    [Color] [nvarchar](20) NOT NULL,
    [Selling Package] [nvarchar](50) NOT NULL,
    [Buying Package] [nvarchar](50) NOT NULL,
    [Brand] [nvarchar](50) NOT NULL,
    [Size] [nvarchar](20) NOT NULL,
    [Lead Time Days] [int] NOT NULL,
    [Quantity Per Outer] [int] NOT NULL,
    [Is Chiller Stock] [bit] NOT NULL,
    [Barcode] [nvarchar](50) NULL,
    [Tax Rate] [decimal](18, 3) NOT NULL,
    [Unit Price] [decimal](18, 2) NOT NULL,
    [Recommended Retail Price] [decimal](18, 2) NULL,
    [Typical Weight Per Unit] [decimal](18, 3) NOT NULL,
    [Photo] [varbinary](300) NULL,
    [Valid From] [datetime2](7) NOT NULL,
    [Valid To] [datetime2](7) NOT NULL,
    [Lineage Key] [int] NOT NULL
)
WITH ( LOCATION ='/v1/dimension_StockItem/',
    DATA_SOURCE = WWIStorage,  
    FILE_FORMAT = TextFileFormat,
    REJECT_TYPE = VALUE,
    REJECT_VALUE = 0
);
CREATE EXTERNAL TABLE [ext].[dimension_Supplier](
    [Supplier Key] [int] NOT NULL,
    [WWI Supplier ID] [int] NOT NULL,
    [Supplier] [nvarchar](100) NOT NULL,
    [Category] [nvarchar](50) NOT NULL,
    [Primary Contact] [nvarchar](50) NOT NULL,
    [Supplier Reference] [nvarchar](20) NULL,
    [Payment Days] [int] NOT NULL,
    [Postal Code] [nvarchar](10) NOT NULL,
    [Valid From] [datetime2](7) NOT NULL,
    [Valid To] [datetime2](7) NOT NULL,
    [Lineage Key] [int] NOT NULL
)
WITH ( LOCATION ='/v1/dimension_Supplier/',
    DATA_SOURCE = WWIStorage,  
    FILE_FORMAT = TextFileFormat,
    REJECT_TYPE = VALUE,
    REJECT_VALUE = 0
);
CREATE EXTERNAL TABLE [ext].[dimension_TransactionType](
    [Transaction Type Key] [int] NOT NULL,
    [WWI Transaction Type ID] [int] NOT NULL,
    [Transaction Type] [nvarchar](50) NOT NULL,
    [Valid From] [datetime2](7) NOT NULL,
    [Valid To] [datetime2](7) NOT NULL,
    [Lineage Key] [int] NOT NULL
)
WITH ( LOCATION ='/v1/dimension_TransactionType/',
    DATA_SOURCE = WWIStorage,  
    FILE_FORMAT = TextFileFormat,
    REJECT_TYPE = VALUE,
    REJECT_VALUE = 0
);
CREATE EXTERNAL TABLE [ext].[fact_Movement] (
    [Movement Key] [bigint] NOT NULL,
    [Date Key] [date] NOT NULL,
    [Stock Item Key] [int] NOT NULL,
    [Customer Key] [int] NULL,
    [Supplier Key] [int] NULL,
    [Transaction Type Key] [int] NOT NULL,
    [WWI Stock Item Transaction ID] [int] NOT NULL,
    [WWI Invoice ID] [int] NULL,
    [WWI Purchase Order ID] [int] NULL,
    [Quantity] [int] NOT NULL,
    [Lineage Key] [int] NOT NULL
)
WITH ( LOCATION ='/v1/fact_Movement/',
    DATA_SOURCE = WWIStorage,  
    FILE_FORMAT = TextFileFormat,
    REJECT_TYPE = VALUE,
    REJECT_VALUE = 0
);
CREATE EXTERNAL TABLE [ext].[fact_Order] (
    [Order Key] [bigint] NOT NULL,
    [City Key] [int] NOT NULL,
    [Customer Key] [int] NOT NULL,
    [Stock Item Key] [int] NOT NULL,
    [Order Date Key] [date] NOT NULL,
    [Picked Date Key] [date] NULL,
    [Salesperson Key] [int] NOT NULL,
    [Picker Key] [int] NULL,
    [WWI Order ID] [int] NOT NULL,
    [WWI Backorder ID] [int] NULL,
    [Description] [nvarchar](100) NOT NULL,
    [Package] [nvarchar](50) NOT NULL,
    [Quantity] [int] NOT NULL,
    [Unit Price] [decimal](18, 2) NOT NULL,
    [Tax Rate] [decimal](18, 3) NOT NULL,
    [Total Excluding Tax] [decimal](18, 2) NOT NULL,
    [Tax Amount] [decimal](18, 2) NOT NULL,
    [Total Including Tax] [decimal](18, 2) NOT NULL,
    [Lineage Key] [int] NOT NULL
)
WITH ( LOCATION ='/v1/fact_Order/',
    DATA_SOURCE = WWIStorage,
    FILE_FORMAT = TextFileFormat,
    REJECT_TYPE = VALUE,
    REJECT_VALUE = 0
);
CREATE EXTERNAL TABLE [ext].[fact_Purchase] (
    [Purchase Key] [bigint] NOT NULL,
    [Date Key] [date] NOT NULL,
    [Supplier Key] [int] NOT NULL,
    [Stock Item Key] [int] NOT NULL,
    [WWI Purchase Order ID] [int] NULL,
    [Ordered Outers] [int] NOT NULL,
    [Ordered Quantity] [int] NOT NULL,
    [Received Outers] [int] NOT NULL,
    [Package] [nvarchar](50) NOT NULL,
    [Is Order Finalized] [bit] NOT NULL,
    [Lineage Key] [int] NOT NULL
)
WITH ( LOCATION ='/v1/fact_Purchase/',
    DATA_SOURCE = WWIStorage,  
    FILE_FORMAT = TextFileFormat,
    REJECT_TYPE = VALUE,
    REJECT_VALUE = 0
);
CREATE EXTERNAL TABLE [ext].[fact_Sale] (
    [Sale Key] [bigint] NOT NULL,
    [City Key] [int] NOT NULL,
    [Customer Key] [int] NOT NULL,
    [Bill To Customer Key] [int] NOT NULL,
    [Stock Item Key] [int] NOT NULL,
    [Invoice Date Key] [date] NOT NULL,
    [Delivery Date Key] [date] NULL,
    [Salesperson Key] [int] NOT NULL,
    [WWI Invoice ID] [int] NOT NULL,
    [Description] [nvarchar](100) NOT NULL,
    [Package] [nvarchar](50) NOT NULL,
    [Quantity] [int] NOT NULL,
    [Unit Price] [decimal](18, 2) NOT NULL,
    [Tax Rate] [decimal](18, 3) NOT NULL,
    [Total Excluding Tax] [decimal](18, 2) NOT NULL,
    [Tax Amount] [decimal](18, 2) NOT NULL,
    [Profit] [decimal](18, 2) NOT NULL,
    [Total Including Tax] [decimal](18, 2) NOT NULL,
    [Total Dry Items] [int] NOT NULL,
    [Total Chiller Items] [int] NOT NULL,
    [Lineage Key] [int] NOT NULL
)
WITH ( LOCATION ='/v1/fact_Sale/',
    DATA_SOURCE = WWIStorage,  
    FILE_FORMAT = TextFileFormat,
    REJECT_TYPE = VALUE,
    REJECT_VALUE = 0
);
CREATE EXTERNAL TABLE [ext].[fact_StockHolding] (
    [Stock Holding Key] [bigint] NOT NULL,
    [Stock Item Key] [int] NOT NULL,
    [Quantity On Hand] [int] NOT NULL,
    [Bin Location] [nvarchar](20) NOT NULL,
    [Last Stocktake Quantity] [int] NOT NULL,
    [Last Cost Price] [decimal](18, 2) NOT NULL,
    [Reorder Level] [int] NOT NULL,
    [Target Stock Level] [int] NOT NULL,
    [Lineage Key] [int] NOT NULL
)
WITH ( LOCATION ='/v1/fact_StockHolding/',
    DATA_SOURCE = WWIStorage,  
    FILE_FORMAT = TextFileFormat,
    REJECT_TYPE = VALUE,
    REJECT_VALUE = 0
);
CREATE EXTERNAL TABLE [ext].[fact_Transaction] (
    [Transaction Key] [bigint] NOT NULL,
    [Date Key] [date] NOT NULL,
    [Customer Key] [int] NULL,
    [Bill To Customer Key] [int] NULL,
    [Supplier Key] [int] NULL,
    [Transaction Type Key] [int] NOT NULL,
    [Payment Method Key] [int] NULL,
    [WWI Customer Transaction ID] [int] NULL,
    [WWI Supplier Transaction ID] [int] NULL,
    [WWI Invoice ID] [int] NULL,
    [WWI Purchase Order ID] [int] NULL,
    [Supplier Invoice Number] [nvarchar](20) NULL,
    [Total Excluding Tax] [decimal](18, 2) NOT NULL,
    [Tax Amount] [decimal](18, 2) NOT NULL,
    [Total Including Tax] [decimal](18, 2) NOT NULL,
    [Outstanding Balance] [decimal](18, 2) NOT NULL,
    [Is Finalized] [bit] NOT NULL,
    [Lineage Key] [int] NOT NULL
)
WITH ( LOCATION ='/v1/fact_Transaction/',
    DATA_SOURCE = WWIStorage,  
    FILE_FORMAT = TextFileFormat,
    REJECT_TYPE = VALUE,
    REJECT_VALUE = 0
);

  8. Di Object Explorer, luaskan SampleDW untuk melihat daftar tabel eksternal yang Anda buat.

    Lihat tabel external

Muat data ke kumpulan SQL

Bagian ini menggunakan tabel eksternal yang Anda tentukan untuk memuat data sampel dari Blob Azure ke kumpulan SQL.

Catatan

Tutorial ini memuat data langsung ke tabel akhir. Di lingkungan produksi, Anda biasanya akan menggunakan CREATE TABLE AS SELECT untuk memuat ke dalam tabel pentahapan. Saat data berada dalam tabel pentahapan, Anda dapat melakukan transformasi yang diperlukan. Untuk menambahkan data dalam tabel pentahapan ke tabel produksi, Anda dapat menggunakan pernyataan INSERT...SELECT. Untuk mengetahui informasi selengkapnya, lihat Menyisipkan data ke dalam tabel produksi.

Skrip menggunakan pernyataan T-SQL CREATE TABLE AS SELECT (CTAS) untuk memuat data dari Blob Azure Storage ke tabel baru di gudang data Anda. CTAS membuat tabel baru berdasarkan hasil pernyataan pemilihan. Tabel baru memiliki kolom dan jenis data yang sama dengan hasil pernyataan pemilihan. Saat pernyataan pemilihan memilih dari tabel eksternal, data diimpor ke tabel relasional di gudang data.

Skrip ini tidak memuat data ke tabel wwi.dimension_Date and wwi.fact_Sale. Tabel ini dihasilkan dalam langkah selanjutnya untuk membuat tabel memiliki jumlah baris yang cukup besar.

  1. Jalankan skrip berikut untuk memuat data ke tabel baru di gudang data Anda.

    CREATE TABLE [wwi].[dimension_City]
WITH
(
    DISTRIBUTION = REPLICATE,
    CLUSTERED COLUMNSTORE INDEX
)
AS
SELECT * FROM [ext].[dimension_City]
OPTION (LABEL = 'CTAS : Load [wwi].[dimension_City]')
;

CREATE TABLE [wwi].[dimension_Customer]
WITH
(
    DISTRIBUTION = REPLICATE,
    CLUSTERED COLUMNSTORE INDEX
)
AS
SELECT * FROM [ext].[dimension_Customer]
OPTION (LABEL = 'CTAS : Load [wwi].[dimension_Customer]')
;

CREATE TABLE [wwi].[dimension_Employee]
WITH
(
    DISTRIBUTION = REPLICATE,
    CLUSTERED COLUMNSTORE INDEX
)
AS
SELECT * FROM [ext].[dimension_Employee]
OPTION (LABEL = 'CTAS : Load [wwi].[dimension_Employee]')
;

CREATE TABLE [wwi].[dimension_PaymentMethod]
WITH
(
    DISTRIBUTION = REPLICATE,
    CLUSTERED COLUMNSTORE INDEX
)
AS
SELECT * FROM [ext].[dimension_PaymentMethod]
OPTION (LABEL = 'CTAS : Load [wwi].[dimension_PaymentMethod]')
;

CREATE TABLE [wwi].[dimension_StockItem]
WITH
(
    DISTRIBUTION = REPLICATE,
    CLUSTERED COLUMNSTORE INDEX
)
AS
SELECT * FROM [ext].[dimension_StockItem]
OPTION (LABEL = 'CTAS : Load [wwi].[dimension_StockItem]')
;

CREATE TABLE [wwi].[dimension_Supplier]
WITH
(
    DISTRIBUTION = REPLICATE,
    CLUSTERED COLUMNSTORE INDEX
)
AS
SELECT * FROM [ext].[dimension_Supplier]
OPTION (LABEL = 'CTAS : Load [wwi].[dimension_Supplier]')
;

CREATE TABLE [wwi].[dimension_TransactionType]
WITH
(
    DISTRIBUTION = REPLICATE,
    CLUSTERED COLUMNSTORE INDEX
)
AS
SELECT * FROM [ext].[dimension_TransactionType]
OPTION (LABEL = 'CTAS : Load [wwi].[dimension_TransactionType]')
;

CREATE TABLE [wwi].[fact_Movement]
WITH
(
    DISTRIBUTION = HASH([Movement Key]),
    CLUSTERED COLUMNSTORE INDEX
)
AS
SELECT * FROM [ext].[fact_Movement]
OPTION (LABEL = 'CTAS : Load [wwi].[fact_Movement]')
;

CREATE TABLE [wwi].[fact_Order]
WITH
(
    DISTRIBUTION = HASH([Order Key]),
    CLUSTERED COLUMNSTORE INDEX
)
AS
SELECT * FROM [ext].[fact_Order]
OPTION (LABEL = 'CTAS : Load [wwi].[fact_Order]')
;

CREATE TABLE [wwi].[fact_Purchase]
WITH
(
    DISTRIBUTION = HASH([Purchase Key]),
    CLUSTERED COLUMNSTORE INDEX
)
AS
SELECT * FROM [ext].[fact_Purchase]
OPTION (LABEL = 'CTAS : Load [wwi].[fact_Purchase]')
;

CREATE TABLE [wwi].[seed_Sale]
WITH
(
    DISTRIBUTION = HASH([WWI Invoice ID]),
    CLUSTERED COLUMNSTORE INDEX
)
AS
SELECT * FROM [ext].[fact_Sale]
OPTION (LABEL = 'CTAS : Load [wwi].[seed_Sale]')
;

CREATE TABLE [wwi].[fact_StockHolding]
WITH
(
    DISTRIBUTION = HASH([Stock Holding Key]),
    CLUSTERED COLUMNSTORE INDEX
)
AS
SELECT * FROM [ext].[fact_StockHolding]
OPTION (LABEL = 'CTAS : Load [wwi].[fact_StockHolding]')
;

CREATE TABLE [wwi].[fact_Transaction]
WITH
(
    DISTRIBUTION = HASH([Transaction Key]),
    CLUSTERED COLUMNSTORE INDEX
)
AS
SELECT * FROM [ext].[fact_Transaction]
OPTION (LABEL = 'CTAS : Load [wwi].[fact_Transaction]')
;

  2. Lihat data Anda saat dimuat. Anda memuat beberapa GB data dan memadatkannya ke dalam indeks penyimpan kolom berkluster dengan performa tinggi. Buka jendela kueri baru di SampleDW, dan jalankan kueri berikut untuk menunjukkan status pemuatan. Setelah memulai kueri, ambil kopi dan camilan selagi kumpulan SQL melakukan beberapa pekerjaan berat.

    SELECT
    r.command,
    s.request_id,
    r.status,
    count(distinct input_name) as nbr_files,
    sum(s.bytes_processed)/1024/1024/1024 as gb_processed
FROM
    sys.dm_pdw_exec_requests r
    INNER JOIN sys.dm_pdw_dms_external_work s
    ON r.request_id = s.request_id
WHERE
    r.[label] = 'CTAS : Load [wwi].[dimension_City]' OR
    r.[label] = 'CTAS : Load [wwi].[dimension_Customer]' OR
    r.[label] = 'CTAS : Load [wwi].[dimension_Employee]' OR
    r.[label] = 'CTAS : Load [wwi].[dimension_PaymentMethod]' OR
    r.[label] = 'CTAS : Load [wwi].[dimension_StockItem]' OR
    r.[label] = 'CTAS : Load [wwi].[dimension_Supplier]' OR
    r.[label] = 'CTAS : Load [wwi].[dimension_TransactionType]' OR
    r.[label] = 'CTAS : Load [wwi].[fact_Movement]' OR
    r.[label] = 'CTAS : Load [wwi].[fact_Order]' OR
    r.[label] = 'CTAS : Load [wwi].[fact_Purchase]' OR
    r.[label] = 'CTAS : Load [wwi].[fact_StockHolding]' OR
    r.[label] = 'CTAS : Load [wwi].[fact_Transaction]'
GROUP BY
    r.command,
    s.request_id,
    r.status
ORDER BY
    nbr_files desc,
    gb_processed desc;

  3. Lihat semua kueri sistem.

    SELECT * FROM sys.dm_pdw_exec_requests;

  4. Nikmati melihat data Anda dimuat dengan baik ke dalam gudang data Anda.

    Lihat tabel yang dimuat

Membuat tabel dan prosedur untuk menghasilkan tabel Tanggal dan Penjualan

Bagian ini membuat tabel wwi.dimension_Date and wwi.fact_Sale. Bagian ini juga membuat prosedur tersimpan yang dapat menghasilkan jutaan baris di tabel wwi.dimension_Date dan wwi.fact_Sale.

  1. Membuat tabel dimension_Date and fact_Sale.

    CREATE TABLE [wwi].[dimension_Date]
(
    [Date] [datetime] NOT NULL,
    [Day Number] [int] NOT NULL,
    [Day] [nvarchar](10) NOT NULL,
    [Month] [nvarchar](10) NOT NULL,
    [Short Month] [nvarchar](3) NOT NULL,
    [Calendar Month Number] [int] NOT NULL,
    [Calendar Month Label] [nvarchar](20) NOT NULL,
    [Calendar Year] [int] NOT NULL,
    [Calendar Year Label] [nvarchar](10) NOT NULL,
    [Fiscal Month Number] [int] NOT NULL,
    [Fiscal Month Label] [nvarchar](20) NOT NULL,
    [Fiscal Year] [int] NOT NULL,
    [Fiscal Year Label] [nvarchar](10) NOT NULL,
    [ISO Week Number] [int] NOT NULL
)
WITH
(
    DISTRIBUTION = REPLICATE,
    CLUSTERED INDEX ([Date])
);
CREATE TABLE [wwi].[fact_Sale]
(
    [Sale Key] [bigint] IDENTITY(1,1) NOT NULL,
    [City Key] [int] NOT NULL,
    [Customer Key] [int] NOT NULL,
    [Bill To Customer Key] [int] NOT NULL,
    [Stock Item Key] [int] NOT NULL,
    [Invoice Date Key] [date] NOT NULL,
    [Delivery Date Key] [date] NULL,
    [Salesperson Key] [int] NOT NULL,
    [WWI Invoice ID] [int] NOT NULL,
    [Description] [nvarchar](100) NOT NULL,
    [Package] [nvarchar](50) NOT NULL,
    [Quantity] [int] NOT NULL,
    [Unit Price] [decimal](18, 2) NOT NULL,
    [Tax Rate] [decimal](18, 3) NOT NULL,
    [Total Excluding Tax] [decimal](18, 2) NOT NULL,
    [Tax Amount] [decimal](18, 2) NOT NULL,
    [Profit] [decimal](18, 2) NOT NULL,
    [Total Including Tax] [decimal](18, 2) NOT NULL,
    [Total Dry Items] [int] NOT NULL,
    [Total Chiller Items] [int] NOT NULL,
    [Lineage Key] [int] NOT NULL
)
WITH
(
    DISTRIBUTION = HASH ( [WWI Invoice ID] ),
    CLUSTERED COLUMNSTORE INDEX
)

  2. Buat [wwi].[InitialSalesDataPopulation] untuk meningkatkan jumlah baris di [wwi].[seed_Sale] dengan faktor delapan.

    CREATE PROCEDURE [wwi].[InitialSalesDataPopulation] AS
BEGIN
    INSERT INTO [wwi].[seed_Sale] (
        [Sale Key], [City Key], [Customer Key], [Bill To Customer Key], [Stock Item Key], [Invoice Date Key], [Delivery Date Key], [Salesperson Key], [WWI Invoice ID], [Description], [Package], [Quantity], [Unit Price], [Tax Rate], [Total Excluding Tax], [Tax Amount], [Profit], [Total Including Tax], [Total Dry Items], [Total Chiller Items], [Lineage Key]
    )
    SELECT
        [Sale Key], [City Key], [Customer Key], [Bill To Customer Key], [Stock Item Key], [Invoice Date Key], [Delivery Date Key], [Salesperson Key], [WWI Invoice ID], [Description], [Package], [Quantity], [Unit Price], [Tax Rate], [Total Excluding Tax], [Tax Amount], [Profit], [Total Including Tax], [Total Dry Items], [Total Chiller Items], [Lineage Key]
    FROM [wwi].[seed_Sale]

    INSERT INTO [wwi].[seed_Sale] (
        [Sale Key], [City Key], [Customer Key], [Bill To Customer Key], [Stock Item Key], [Invoice Date Key], [Delivery Date Key], [Salesperson Key], [WWI Invoice ID], [Description], [Package], [Quantity], [Unit Price], [Tax Rate], [Total Excluding Tax], [Tax Amount], [Profit], [Total Including Tax], [Total Dry Items], [Total Chiller Items], [Lineage Key]
    )
    SELECT
        [Sale Key], [City Key], [Customer Key], [Bill To Customer Key], [Stock Item Key], [Invoice Date Key], [Delivery Date Key], [Salesperson Key], [WWI Invoice ID], [Description], [Package], [Quantity], [Unit Price], [Tax Rate], [Total Excluding Tax], [Tax Amount], [Profit], [Total Including Tax], [Total Dry Items], [Total Chiller Items], [Lineage Key]
    FROM [wwi].[seed_Sale]

    INSERT INTO [wwi].[seed_Sale] (
        [Sale Key], [City Key], [Customer Key], [Bill To Customer Key], [Stock Item Key], [Invoice Date Key], [Delivery Date Key], [Salesperson Key], [WWI Invoice ID], [Description], [Package], [Quantity], [Unit Price], [Tax Rate], [Total Excluding Tax], [Tax Amount], [Profit], [Total Including Tax], [Total Dry Items], [Total Chiller Items], [Lineage Key]
    )
    SELECT
        [Sale Key], [City Key], [Customer Key], [Bill To Customer Key], [Stock Item Key], [Invoice Date Key], [Delivery Date Key], [Salesperson Key], [WWI Invoice ID], [Description], [Package], [Quantity], [Unit Price], [Tax Rate], [Total Excluding Tax], [Tax Amount], [Profit], [Total Including Tax], [Total Dry Items], [Total Chiller Items], [Lineage Key]
    FROM [wwi].[seed_Sale]
END

  3. Buat prosedur tersimpan ini yang mengisi baris ke dalam wwi.dimension_Date.

    CREATE PROCEDURE [wwi].[PopulateDateDimensionForYear] @Year [int] AS
BEGIN
    IF OBJECT_ID('tempdb..#month', 'U') IS NOT NULL
        DROP TABLE #month
    CREATE TABLE #month (
        monthnum int,
        numofdays int
    )
    WITH ( DISTRIBUTION = ROUND_ROBIN, heap )
    INSERT INTO #month
        SELECT 1, 31 UNION SELECT 2, CASE WHEN (@YEAR % 4 = 0 AND @YEAR % 100 <> 0) OR @YEAR % 400 = 0 THEN 29 ELSE 28 END UNION SELECT 3,31 UNION SELECT 4,30 UNION SELECT 5,31 UNION SELECT 6,30 UNION SELECT 7,31 UNION SELECT 8,31 UNION SELECT 9,30 UNION SELECT 10,31 UNION SELECT 11,30 UNION SELECT 12,31

    IF OBJECT_ID('tempdb..#days', 'U') IS NOT NULL
        DROP TABLE #days
    CREATE TABLE #days (days int)
    WITH (DISTRIBUTION = ROUND_ROBIN, HEAP)

    INSERT INTO #days
        SELECT 1 UNION SELECT 2 UNION SELECT 3 UNION SELECT 4 UNION SELECT 5 UNION SELECT 6 UNION SELECT 7 UNION SELECT 8 UNION SELECT 9 UNION SELECT 10 UNION SELECT 11 UNION SELECT 12 UNION SELECT 13 UNION SELECT 14 UNION SELECT 15 UNION SELECT 16 UNION SELECT 17 UNION SELECT 18 UNION SELECT 19 UNION SELECT 20    UNION SELECT 21 UNION SELECT 22 UNION SELECT 23 UNION SELECT 24 UNION SELECT 25 UNION SELECT 26 UNION SELECT 27 UNION SELECT 28 UNION SELECT 29 UNION SELECT 30 UNION SELECT 31

    INSERT [wwi].[dimension_Date] (
        [Date], [Day Number], [Day], [Month], [Short Month], [Calendar Month Number], [Calendar Month Label], [Calendar Year], [Calendar Year Label], [Fiscal Month Number], [Fiscal Month Label], [Fiscal Year], [Fiscal Year Label], [ISO Week Number]
    )
    SELECT
        CAST(CAST(monthnum AS VARCHAR(2)) + '/' + CAST([days] AS VARCHAR(3)) + '/' + CAST(@year AS CHAR(4)) AS DATE) AS [Date]
        ,DAY(CAST(CAST(monthnum AS VARCHAR(2)) + '/' + CAST([days] AS VARCHAR(3)) + '/' + CAST(@year AS CHAR(4)) AS DATE)) AS [Day Number]
        ,CAST(DATENAME(day, CAST(CAST(monthnum AS VARCHAR(2)) + '/' + CAST([days] AS VARCHAR(3)) + '/' + CAST(@year AS CHAR(4)) AS DATE)) AS NVARCHAR(10)) AS [Day]
        ,CAST(DATENAME(month, CAST(CAST(monthnum AS VARCHAR(2)) + '/' + CAST([days] AS VARCHAR(3)) + '/' + CAST(@year as char(4)) AS DATE)) AS nvarchar(10)) AS [Month]
        ,CAST(SUBSTRING(DATENAME(month, CAST(CAST(monthnum as varchar(2)) + '/' + CAST([days] as varchar(3)) + '/' + CAST(@year as char(4)) AS DATE)), 1, 3) AS nvarchar(3)) AS [Short Month]
        ,MONTH(CAST(CAST(monthnum as varchar(2)) + '/' + CAST([days] as varchar(3)) + '/' + CAST(@year as char(4)) AS DATE)) AS [Calendar Month Number]
        ,CAST(N'CY' + CAST(YEAR(CAST(CAST(monthnum as varchar(2)) + '/' + CAST([days] as varchar(3)) + '/' + CAST(@year as char(4)) AS DATE)) AS nvarchar(4)) + N'-' + SUBSTRING(DATENAME(month, CAST(CAST(monthnum as varchar(2)) + '/' + CAST([days] as varchar(3)) + '/' + CAST(@year as char(4)) AS DATE)), 1, 3) AS nvarchar(10)) AS [Calendar Month Label]
        ,YEAR(CAST(CAST(monthnum as varchar(2)) + '/' + CAST([days] as varchar(3)) + '/' + CAST(@year as char(4)) AS DATE)) AS [Calendar Year]
        ,CAST(N'CY' + CAST(YEAR(CAST(CAST(monthnum as varchar(2)) + '/' + CAST([days] as varchar(3)) + '/' + CAST(@year as char(4)) AS DATE)) AS nvarchar(4)) AS nvarchar(10)) AS [Calendar Year Label]
        ,CASE WHEN MONTH(CAST(CAST(monthnum as varchar(2)) + '/' + CAST([days] as varchar(3)) + '/' + CAST(@year as char(4)) AS DATE)) IN (11, 12)
        THEN MONTH(CAST(CAST(monthnum as varchar(2)) + '/' + CAST([days] as varchar(3)) + '/' + CAST(@year as char(4)) AS DATE)) - 10
        ELSE MONTH(CAST(CAST(monthnum as varchar(2)) + '/' + CAST([days] as varchar(3)) + '/' + CAST(@year as char(4)) AS DATE)) + 2 END AS [Fiscal Month Number]
        ,CAST(N'FY' + CAST(CASE WHEN MONTH(CAST(CAST(monthnum as varchar(2)) + '/' + CAST([days] as varchar(3)) + '/' + CAST(@year as char(4)) AS DATE)) IN (11, 12)
        THEN YEAR(CAST(CAST(monthnum as varchar(2)) + '/' + CAST([days] as varchar(3)) + '/' + CAST(@year as char(4)) AS DATE)) + 1
        ELSE YEAR(CAST(CAST(monthnum as varchar(2)) + '/' + CAST([days] as varchar(3)) + '/' + CAST(@year as char(4)) AS DATE)) END AS nvarchar(4)) + N'-' + SUBSTRING(DATENAME(month, CAST(CAST(monthnum as varchar(2)) + '/' + CAST([days] as varchar(3)) + '/' + CAST(@year as char(4)) AS DATE)), 1, 3) AS nvarchar(20)) AS [Fiscal Month Label]
        ,CASE WHEN MONTH(CAST(CAST(monthnum as varchar(2)) + '/' + CAST([days] as varchar(3)) + '/' + CAST(@year as char(4)) AS DATE)) IN (11, 12)
        THEN YEAR(CAST(CAST(monthnum as varchar(2)) + '/' + CAST([days] as varchar(3)) + '/' + CAST(@year as char(4)) AS DATE)) + 1
        ELSE YEAR(CAST(CAST(monthnum as varchar(2)) + '/' + CAST([days] as varchar(3)) + '/' + CAST(@year as char(4)) AS DATE)) END AS [Fiscal Year]
        ,CAST(N'FY' + CAST(CASE WHEN MONTH(CAST(CAST(monthnum as varchar(2)) + '/' + CAST([days] as varchar(3)) + '/' + CAST(@year as char(4)) AS DATE)) IN (11, 12)
        THEN YEAR(CAST(CAST(monthnum as varchar(2)) + '/' + CAST([days] as varchar(3)) + '/' + CAST(@year as char(4)) AS DATE)) + 1
        ELSE YEAR(CAST(CAST(monthnum as varchar(2)) + '/' + CAST([days] as varchar(3)) + '/' + CAST(@year as char(4)) AS DATE))END AS nvarchar(4)) AS nvarchar(10)) AS [Fiscal Year Label]
        , DATEPART(ISO_WEEK, CAST(CAST(monthnum as varchar(2)) + '/' + CAST([days] as varchar(3)) + '/' + CAST(@year as char(4)) AS DATE)) AS [ISO Week Number]
FROM #month m
    CROSS JOIN #days d
WHERE d.days <= m.numofdays

DROP table #month;
DROP table #days;
END;

  4. Buat prosedur ini yang mengisi tabel wwi.dimension_Date dan wwi.fact_Sale. Prosedur memanggil [wwi].[PopulateDateDimensionForYear] untuk mengisi wwi.dimension_Date.

    CREATE PROCEDURE [wwi].[Configuration_PopulateLargeSaleTable] @EstimatedRowsPerDay [bigint],@Year [int] AS
BEGIN
    SET NOCOUNT ON;
    SET XACT_ABORT ON;

    EXEC [wwi].[PopulateDateDimensionForYear] @Year;

    DECLARE @OrderCounter bigint = 0;
    DECLARE @NumberOfSalesPerDay bigint = @EstimatedRowsPerDay;
    DECLARE @DateCounter date;
    DECLARE @StartingSaleKey bigint;
    DECLARE @MaximumSaleKey bigint = (SELECT MAX([Sale Key]) FROM wwi.seed_Sale);
    DECLARE @MaxDate date;
    SET @MaxDate = (SELECT MAX([Invoice Date Key]) FROM wwi.fact_Sale)
    IF ( @MaxDate < CAST(@YEAR AS CHAR(4)) + '1231') AND (@MaxDate > CAST(@YEAR AS CHAR(4)) + '0101')
        SET @DateCounter = @MaxDate
    ELSE
        SET @DateCounter= CAST(@Year as char(4)) + '0101';

    PRINT 'Targeting ' + CAST(@NumberOfSalesPerDay AS varchar(20)) + ' sales per day.';

    DECLARE @OutputCounter varchar(20);
    DECLARE @variance DECIMAL(18,10);
    DECLARE @VariantNumberOfSalesPerDay BIGINT;

    WHILE @DateCounter < CAST(@YEAR AS CHAR(4)) + '1231'
    BEGIN
        SET @OutputCounter = CONVERT(varchar(20), @DateCounter, 112);
        RAISERROR(@OutputCounter, 0, 1);
        SET @variance = (SELECT RAND() * 10)*.01 + .95
        SET @VariantNumberOfSalesPerDay = FLOOR(@NumberOfSalesPerDay * @variance)

        SET @StartingSaleKey = @MaximumSaleKey - @VariantNumberOfSalesPerDay - FLOOR(RAND() * 20000);
        SET @OrderCounter = 0;

        INSERT [wwi].[fact_Sale] (
            [City Key], [Customer Key], [Bill To Customer Key], [Stock Item Key], [Invoice Date Key], [Delivery Date Key], [Salesperson Key], [WWI Invoice ID], [Description], Package, Quantity, [Unit Price], [Tax Rate], [Total Excluding Tax], [Tax Amount], Profit, [Total Including Tax], [Total Dry Items], [Total Chiller Items], [Lineage Key]
        )
        SELECT TOP(@VariantNumberOfSalesPerDay)
            [City Key], [Customer Key], [Bill To Customer Key], [Stock Item Key], @DateCounter, DATEADD(day, 1, @DateCounter), [Salesperson Key], [WWI Invoice ID], [Description], Package, Quantity, [Unit Price], [Tax Rate], [Total Excluding Tax], [Tax Amount], Profit, [Total Including Tax], [Total Dry Items], [Total Chiller Items], [Lineage Key]
        FROM [wwi].[seed_Sale]
        WHERE
             --[Sale Key] > @StartingSaleKey and /* IDENTITY DOES NOT WORK THE SAME IN SQLDW AND CAN'T USE THIS METHOD FOR VARIANT */
            [Invoice Date Key] >=cast(@YEAR AS CHAR(4)) + '-01-01'
        ORDER BY [Sale Key];

        SET @DateCounter = DATEADD(day, 1, @DateCounter);
    END;

END;

Menghasilkan jutaan baris

Gunakan prosedur tersimpan yang Anda buat untuk menghasilkan jutaan baris dalam tabel wwi.fact_Sale, dan data terkait dalam tabel wwi.dimension_Date.

  1. Jalankan prosedur ini untuk menambah [wwi].[seed_Sale] dengan lebih banyak baris.

    EXEC [wwi].[InitialSalesDataPopulation]

  2. Jalankan prosedur ini untuk mengisi wwi.fact_Sale dengan 100.000 baris per hari untuk setiap hari di tahun 2000.

    EXEC [wwi].[Configuration_PopulateLargeSaleTable] 100000, 2000

  3. Pembuatan data pada langkah sebelumnya mungkin memakan waktu cukup lama seiring berjalannya tahun. Untuk melihat pada hari mana proses saat ini dimulai, buka kueri baru dan jalankan perintah SQL ini:

    SELECT MAX([Invoice Date Key]) FROM wwi.fact_Sale;

  4. Jalankan perintah berikut untuk melihat ruang yang digunakan.

    EXEC sp_spaceused N'wwi.fact_Sale';

Isi cache tabel tereplikasi

Kumpulan SQL mereplikasi tabel dengan mencache data ke setiap simpul Komputasi. Cache akan diisi saat kueri berjalan melawan tabel. Oleh karena itu, kueri pertama pada tabel tereplikasi mungkin memerlukan waktu tambahan untuk mengisi cache. Setelah cache diisi, kueri pada tabel tereplikasi berjalan lebih cepat.

Jalankan kueri SQL ini untuk mengisi cache tabel tereplikasi pada simpul Komputasi.

SELECT TOP 1 * FROM [wwi].[dimension_City];
SELECT TOP 1 * FROM [wwi].[dimension_Customer];
SELECT TOP 1 * FROM [wwi].[dimension_Date];
SELECT TOP 1 * FROM [wwi].[dimension_Employee];
SELECT TOP 1 * FROM [wwi].[dimension_PaymentMethod];
SELECT TOP 1 * FROM [wwi].[dimension_StockItem];
SELECT TOP 1 * FROM [wwi].[dimension_Supplier];
SELECT TOP 1 * FROM [wwi].[dimension_TransactionType];

Membuat statistik pada data yang baru dimuat

Untuk mencapai performa kueri yang tinggi, penting untuk membuat statistik pada masing-masing kolom setiap tabel setelah dimuat pertama kali. Penting juga untuk memperbarui statistik setelah perubahan substansial dalam data.

  1. Buat prosedur tersimpan ini yang memperbarui statistik pada semua kolom di semua tabel.

    CREATE PROCEDURE    [dbo].[prc_sqldw_create_stats]
(   @create_type    tinyint -- 1 default 2 Fullscan 3 Sample
,   @sample_pct     tinyint
)
AS

IF @create_type IS NULL
BEGIN
    SET @create_type = 1;
END;

IF @create_type NOT IN (1,2,3)
BEGIN
    THROW 151000,'Invalid value for @stats_type parameter. Valid range 1 (default), 2 (fullscan) or 3 (sample).',1;
END;

IF @sample_pct IS NULL
BEGIN;
    SET @sample_pct = 20;
END;

IF OBJECT_ID('tempdb..#stats_ddl') IS NOT NULL
BEGIN;
    DROP TABLE #stats_ddl;
END;

CREATE TABLE #stats_ddl
WITH    (   DISTRIBUTION    = HASH([seq_nmbr])
        ,   LOCATION        = USER_DB
        )
AS
WITH T
AS
(
SELECT      t.[name]                        AS [table_name]
,           s.[name]                        AS [table_schema_name]
,           c.[name]                        AS [column_name]
,           c.[column_id]                   AS [column_id]
,           t.[object_id]                   AS [object_id]
,           ROW_NUMBER()
            OVER(ORDER BY (SELECT NULL))    AS [seq_nmbr]
FROM        sys.[tables] t
JOIN        sys.[schemas] s         ON  t.[schema_id]       = s.[schema_id]
JOIN        sys.[columns] c         ON  t.[object_id]       = c.[object_id]
LEFT JOIN   sys.[stats_columns] l   ON  l.[object_id]       = c.[object_id]
                                    AND l.[column_id]       = c.[column_id]
                                    AND l.[stats_column_id] = 1
LEFT JOIN    sys.[external_tables] e    ON    e.[object_id]        = t.[object_id]
WHERE       l.[object_id] IS NULL
AND            e.[object_id] IS NULL -- not an external table
)
SELECT  [table_schema_name]
,       [table_name]
,       [column_name]
,       [column_id]
,       [object_id]
,       [seq_nmbr]
,       CASE @create_type
        WHEN 1
        THEN    CAST('CREATE STATISTICS '+QUOTENAME('stat_'+table_schema_name+ '_' + table_name + '_'+column_name)+' ON '+QUOTENAME(table_schema_name)+'.'+QUOTENAME(table_name)+'('+QUOTENAME(column_name)+')' AS VARCHAR(8000))
        WHEN 2
        THEN    CAST('CREATE STATISTICS '+QUOTENAME('stat_'+table_schema_name+ '_' + table_name + '_'+column_name)+' ON '+QUOTENAME(table_schema_name)+'.'+QUOTENAME(table_name)+'('+QUOTENAME(column_name)+') WITH FULLSCAN' AS VARCHAR(8000))
        WHEN 3
        THEN    CAST('CREATE STATISTICS '+QUOTENAME('stat_'+table_schema_name+ '_' + table_name + '_'+column_name)+' ON '+QUOTENAME(table_schema_name)+'.'+QUOTENAME(table_name)+'('+QUOTENAME(column_name)+') WITH SAMPLE '+CONVERT(varchar(4),@sample_pct)+' PERCENT' AS VARCHAR(8000))
        END AS create_stat_ddl
FROM T
;

DECLARE @i INT              = 1
,       @t INT              = (SELECT COUNT(*) FROM #stats_ddl)
,       @s NVARCHAR(4000)   = N''
;

WHILE @i <= @t
BEGIN
    SET @s=(SELECT create_stat_ddl FROM #stats_ddl WHERE seq_nmbr = @i);
    PRINT @s
    EXEC sp_executesql @s
    SET @i+=1;
END

DROP TABLE #stats_ddl;

  2. Jalankan perintah ini untuk membuat statistik pada semua kolom di semua tabel di gudang data.

    EXEC [dbo].[prc_sqldw_create_stats] 1, NULL;

Membersihkan sumber daya

Anda ditagih untuk sumber daya komputasi dan data yang dimuat ke dalam gudang data. Tagihan ditagihkan secara terpisah.

Ikuti langkah-langkah berikut untuk membersihkan sumber daya.

  1. Masuk ke portal Microsoft Azure, klik pada gudang data Anda.

    Membersihkan sumber daya

  2. Jika Anda ingin menyimpan data di penyimpanan, Anda dapat menjeda komputasi saat Anda tidak menggunakan gudang data. Dengan menjeda komputasi, Anda hanya akan dikenakan biaya untuk penyimpanan data dan Anda dapat melanjutkan komputasi setiap kali Anda siap untuk bekerja dengan data. Untuk menjeda komputasi, silakan pilih tombol Jeda. Saat gudang data dijeda, Anda akan melihat tombol Mulai. Untuk melanjutkan komputasi, klik Mulai.

  3. Jika Anda ingin menghapus biaya di masa mendatang, Anda dapat menghapus gudang data. Untuk menghapus gudang data sehingga Anda tidak dikenakan biaya untuk komputasi atau penyimpanan, pilih Hapus.

  4. Untuk menghapus server yang Anda buat, klik sample-svr.database.windows.net di gambar sebelumnya, lalu klik Hapus. Berhati-hatilah dengan langkah ini, karena menghapus server akan menghapus semua database yang ditetapkan ke server.

  5. Untuk menghapus grup sumber daya, klik SampleRG, lalu klik Hapus grup sumber daya.

Langkah berikutnya

Dalam tutorial ini, Anda belajar cara membuat gudang data dan membuat pengguna untuk memuat data. Anda membuat tabel eksternal untuk menentukan struktur data yang disimpan di Blob Azure Storage, lalu menggunakan pernyataan CREATE TABLE AS SELECT PolyBase untuk memuat data ke gudang data.

Anda telah melakukan hal-hal ini:

  • Membuat gudang data menggunakan kumpulan SQL di portal Microsoft Azure
  • Siapkan aturan firewall tingkat server di portal Azure
  • Menyambungkan ke kumpulan SQL dengan SQL Server Management Studio
  • Membuat pengguna yang ditunjuk untuk memuat data
  • Membuat tabel eksternal untuk data di Blob Azure Storage
  • Menggunakan pernyataan T-SQL CTAS untuk memuat data ke gudang data Anda
  • Menampilkan progres data saat sedang dimuat
  • Membuat statistik pada data yang baru dimuat

Lanjutkan ke ringkasan pengembangan untuk mempelajari cara memigrasikan database yang ada ke kumpulan SQL Azure Synapse Analytics.

Keputusan desain untuk memigrasikan database yang ada ke kumpulan SQL