Azure synapse : Fastest way to load into Fact table

sakuraime 2,311 Reputation points
2020-12-03T06:42:29.127+00:00

what's the fastest way to load/insert in to Current fact table(NOT CREATE A NEW ONE) ?

– INSERT INTO … SELECT FROM …

– CREATE TABLE … AS SELECT …
– Polybase
– BCP
– OPENROWSET / BULK INSERT
– COPY INTO …

??

Azure Synapse Analytics
Azure Synapse Analytics
An Azure analytics service that brings together data integration, enterprise data warehousing, and big data analytics. Previously known as Azure SQL Data Warehouse.
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  1. David Browne - msft 3,761 Reputation points
    2020-12-07T21:36:06.203+00:00

    BCP loads through the head node, so definitely not as scalable as COPY INTO.

    1 person found this answer helpful.
  2. HimanshuSinha-msft 19,246 Reputation points Microsoft Employee
    2020-12-04T02:28:08.997+00:00

    Hello @sakuraime ,
    Thanks for the ask and using thge forum .
    Since you mentioned that you do not want to create a new one , you should not consider the below will create the table .

    1. CREATE TABLE … AS SELECT …

    INSERT INTO … SELECT FROM … : This is a logged event as so it will be slower the below ones .
    BULK INSERT : This is minimally logged and so its will be slower then BCP .
    BCP should be the fastest among these .
    Polybase shoule be the fastest as polybase automatically parallelizes the data load process

    Thanks
    Himanshu