SQL Server guide

INSERT multiple rows from SQL Server

Bulk insert into a BigQuery table from Microsoft SQL Server. The column list is taken from the source query; use SQL aliases so column names match the target table.

Standard SQL query example

This is the base query accepted by the connector. To execute it in SQL Server, you have to pass it to the Data Gateway via a Linked Server. See how to accomplish this using the examples below.

INSERT INTO MyBQTable1
SOURCE(
    'MSSQL'
  , 'Data Source=localhost;Initial Catalog=tempdb;Integrated Security=true'
  , 'SELECT Col1 AS SomeBQCol1, Col2 AS SomeBQCol2 FROM SomeTable WHERE SomeCol=123'
)
--WITH(DatasetId='TestDataset',Output='*')
--WITH(DatasetId='TestDataset',ProjectId='MyProjectId',Output='*')

Using OPENQUERY in SQL Server

SELECT * FROM OPENQUERY([LS_TO_GOOGLE_BIGQUERY_IN_GATEWAY], 'INSERT INTO MyBQTable1
SOURCE(
    ''MSSQL''
  , ''Data Source=localhost;Initial Catalog=tempdb;Integrated Security=true''
  , ''SELECT Col1 AS SomeBQCol1, Col2 AS SomeBQCol2 FROM SomeTable WHERE SomeCol=123''
)
--WITH(DatasetId=''TestDataset'',Output=''*'')
--WITH(DatasetId=''TestDataset'',ProjectId=''MyProjectId'',Output=''*'')')

Using EXEC in SQL Server (handling larger SQL text)

The major drawback of OPENQUERY is its inability to incorporate variables within SQL statements. This often leads to the use of cumbersome dynamic SQL (with numerous ticks and escape characters).

Fortunately, starting with SQL 2005 and onwards, you can utilize the EXEC (your_sql) AT [LS_TO_GOOGLE_BIGQUERY_IN_GATEWAY] syntax.

DECLARE @MyQuery NVARCHAR(MAX) = 'INSERT INTO MyBQTable1
SOURCE(
    ''MSSQL''
  , ''Data Source=localhost;Initial Catalog=tempdb;Integrated Security=true''
  , ''SELECT Col1 AS SomeBQCol1, Col2 AS SomeBQCol2 FROM SomeTable WHERE SomeCol=123''
)
--WITH(DatasetId=''TestDataset'',Output=''*'')
--WITH(DatasetId=''TestDataset'',ProjectId=''MyProjectId'',Output=''*'')'
EXEC (@MyQuery) AT [LS_TO_GOOGLE_BIGQUERY_IN_GATEWAY]