Gunakan Jenis Tanggal dan Waktu
Berlaku untuk: SQL Server Azure SQL Database Azure SQL Managed Instance Azure Synapse Analytics Analytics Platform System (PDW)
Sampel ini menunjukkan cara menginisialisasi struktur data tanggal/waktu yang ditambahkan di SQL Server 2008 (10.0.x). Kemudian menyiapkan nilai input, mengikat parameter, dan menjalankan kueri. Untuk informasi selengkapnya tentang menggunakan jenis ini, lihat Peningkatan Tanggal dan Waktu (ODBC).
Contoh
Anda akan memerlukan sumber data ODBC yang disebut DateTime. Database default untuk DateTime harus tempdb. Sumber data ini harus didasarkan pada driver ODBC untuk SQL Server Native Client.
Jika Anda akan membangun dan menjalankan sampel ini sebagai aplikasi 32-bit pada sistem operasi 64-bit, Anda harus membuat sumber data ODBC dengan Administrator ODBC di %windir%\SysWOW64\odbcad32.exe.
Sampel ini tersambung ke instans SQL Server default komputer Anda. Untuk menyambungkan ke instans bernama, ubah definisi sumber data ODBC untuk menentukan instans menggunakan format berikut: server\namedinstance. Secara default, SQL Server Express menginstal ke instans bernama.
Daftar kode (Transact-SQL) pertama membuat tabel yang digunakan oleh sampel ini.
Kompilasi daftar kode kedua (C++) dengan odbc32.lib dan user32.lib. Pastikan variabel lingkungan INCLUDE Anda menyertakan direktori yang berisi sqlncli.h.
Daftar kode ketiga (Transact-SQL) menghapus tabel yang digunakan oleh sampel ini.
use tempdb
GO
IF EXISTS (SELECT name FROM sysobjects WHERE name = 'DateTimeTypes')
DROP TABLE DateTimeTypes
GO
CREATE TABLE DateTimeTypes (datecol date, time2col time(7), datetime2col datetime2(7), datetimeoffsetcol datetimeoffset(7))
GO
// compile with: odbc32.lib user32.lib
#include <windows.h>
#include <Sqlext.h>
#include <mbstring.h>
#include <sqlncli.h>
#include <stdio.h>
#define MAX_DATA 1024
#define MYSQLSUCCESS(rc) ( (rc == SQL_SUCCESS) || (rc == SQL_SUCCESS_WITH_INFO) )
class direxec {
RETCODE rc; // ODBC return code
HENV henv; // Environment
HDBC hdbc; // Connection Handle
HSTMT hstmt; // Statement Handle
SQLHDESC hdesc; // Descriptor handle
unsigned char szData[MAX_DATA]; // Returned Data Storage
SDWORD cbData; // Output Length of data
unsigned char char_ds_name[SQL_MAX_DSN_LENGTH]; // Data Source Name
SQL_DATE_STRUCT date; // date structure
SQL_SS_TIME2_STRUCT time2; // time2 structure
SQL_TIMESTAMP_STRUCT datetime2; // datetime2 structure
SQL_SS_TIMESTAMPOFFSET_STRUCT dateTimeOffset; // datetimeoffset structure
SQLLEN cbdate; // size of date structure
SQLLEN cbtime2; // size of time structure
SQLLEN cbdatetime2; // size of datetime2
SQLLEN cbtimestampoffset; //size of dateTimeOffset
public:
direxec(); // Constructor
void sqlconn(); // Allocate env, stat and conn
void sqldisconn(); // Free pointers to env, stat, conn and disconnect
void error_out(); // Display errors
void check_rc(RETCODE rc); // Checks for success of the return code
void sqlinsert(); // Insert into the table
};
// Constructor initializes the string char_ds_name with the data source name and
// initialize the data structures to with the date to be inserted.
direxec::direxec() {
_mbscpy_s(char_ds_name, (const unsigned char *)"DateTime");
// Initialize the date structure
date.day = 12;
date.month = 10;
date.year = 2001;
// Initialize the time structure
time2.hour = 21;
time2.minute = 45;
time2.second = 52;
time2.fraction = 100 ;
// Initialize the datetime2 structure
datetime2.year = 2007;
datetime2.month = 12;
datetime2.day = 26;
datetime2.hour = 0;
datetime2.minute = 0;
datetime2.second = 0;
datetime2.fraction = 100;
// Initialize the timestampoffset structure
dateTimeOffset.year = 2007;
dateTimeOffset.month = 3;
dateTimeOffset.day = 11;
dateTimeOffset.hour = 2;
dateTimeOffset.minute = 30;
dateTimeOffset.second = 29;
dateTimeOffset.fraction = 200;
dateTimeOffset.timezone_hour = -8;
dateTimeOffset.timezone_minute = 0;
// Size of structures
cbdate = sizeof(SQL_DATE_STRUCT);
cbtime2 = sizeof(SQL_SS_TIME2_STRUCT);
cbdatetime2 = sizeof(SQL_TIMESTAMP_STRUCT);
cbtimestampoffset = sizeof(SQL_SS_TIMESTAMPOFFSET_STRUCT);
} // direxec
// Allocate environment handles, connection handle, connect to data source, and allocate statement handle
void direxec::sqlconn() {
// Allocate the environment handle
rc = SQLAllocHandle(SQL_HANDLE_ENV, SQL_NULL_HANDLE, &henv);
check_rc(rc);
// Set the ODBC version to version 3
rc = SQLSetEnvAttr(henv, SQL_ATTR_ODBC_VERSION, (SQLPOINTER) SQL_OV_ODBC3, SQL_IS_INTEGER);
check_rc(rc);
// Allocate the database connection handle
rc = SQLAllocHandle(SQL_HANDLE_DBC, henv, &hdbc);
check_rc(rc);
// Connect to the database
rc = SQLConnect(hdbc, char_ds_name, SQL_NTS, NULL, 0, NULL, 0);
check_rc(rc);
// Allocate the statement handle
rc = SQLAllocHandle(SQL_HANDLE_STMT, hdbc, &hstmt);
check_rc(rc);
// Allocate the descriptor handle
rc = rc = SQLAllocHandle(SQL_HANDLE_DESC, hdbc, &hdesc);
check_rc(rc);
} // direxec::sqlconn
// Display error message from the DiagRecord
void direxec::error_out() {
// String to hold the SQL State
unsigned char szSQLSTATE[10];
// Error code
SDWORD nErr;
// The error message
unsigned char msg[SQL_MAX_MESSAGE_LENGTH + 1];
// Size of the message
SWORD cbmsg;
// If hstmt is not null use that for getting the DiagRec
if (hstmt)
rc = SQLGetDiagRec(SQL_HANDLE_STMT, hstmt, 1, szSQLSTATE, &nErr, msg, sizeof(msg), &cbmsg);
// else get the diag record from the env
else
rc = SQLGetDiagRec(SQL_HANDLE_ENV, henv, 1, szSQLSTATE, &nErr, msg, sizeof(msg), &cbmsg);
// If the rc is successful, show the message using a message box
if ( rc == SQL_SUCCESS) {
char hold_err[100];
_itoa_s(nErr, hold_err, 100, 10);
_snprintf_s((char *)szData, MAX_DATA, MAX_DATA - 1, "%s" "%s" "%s" "%s" "%s" "%s" "%s" "%s",
"Error:", "\n", "SQLSTATE= ", szSQLSTATE, ", Native error=", hold_err, ", msg = ", msg);
MessageBox(NULL, (const char *)szData, "ODBC Error", MB_OK);
}
} // direxec::error_out
// Checks the return code. If failure, displays the error, free the memory and exits the program
void direxec::check_rc(RETCODE rc) {
if (!MYSQLSUCCESS(rc)) {
error_out();
SQLFreeEnv(henv);
SQLFreeConnect(hdbc);
exit(-1);
}
} // direxec::check_rc
// Function to insert dates into the table.
void direxec::sqlinsert() {
rc = SQLPrepare(hstmt, (SQLCHAR *) "INSERT INTO DateTimeTypes (datecol, time2col, datetime2col, datetimeoffsetcol) VALUES (?, ?, ?, ?)", SQL_NTS);
check_rc(rc);
rc = SQLBindParameter(hstmt, 1, SQL_PARAM_INPUT, SQL_C_TYPE_DATE, SQL_TYPE_DATE, 10, 0, &date, 0, &cbdate);
check_rc(rc);
rc = SQLBindParameter(hstmt, 2, SQL_PARAM_INPUT, SQL_C_BINARY, SQL_SS_TIME2, 16, 7, &time2, 0, &cbtime2);
check_rc(rc);
rc = SQLBindParameter(hstmt, 3, SQL_PARAM_INPUT, SQL_C_TIMESTAMP, SQL_TYPE_TIMESTAMP, 27, 7, &datetime2, 0, &cbdatetime2);
check_rc(rc);
rc = SQLBindParameter(hstmt, 4, SQL_PARAM_INPUT, SQL_C_BINARY, SQL_SS_TIMESTAMPOFFSET, 34, 7, &dateTimeOffset, 0, &cbtimestampoffset);
check_rc(rc);
rc = SQLExecute(hstmt);
check_rc(rc);
} // direxec::sqlinsert
int main() {
direxec x;
// Allocate handles, and connect.
x.sqlconn();
// Insert all into the table
x.sqlinsert();
}
USE tempdb
GO
IF EXISTS (SELECT name FROM sysobjects WHERE name = 'DateTimeTypes')
DROP TABLE DateTimeTypes
GO
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