Google Cloud BigQuery Transfer Operator to Microsoft SQL Server¶

Google Cloud BigQuery is Google Cloud’s serverless data warehouse offering. Microsoft SQL Server (MsSQL) is a relational database management system developed by Microsoft. This operator can be used to copy data from a BigQuery table to MSSQL.

Prerequisite Tasks¶

To use these operators, you must do a few things:

Select or create a Cloud Platform project using the Cloud Console.

Enable billing for your project, as described in the Google Cloud documentation.

Enable the API, as described in the Cloud Console documentation.
Install API libraries via pip.
pip install 'apache-airflow[google]'
Detailed information is available for Installation.
Setup a Google Cloud Connection.

Operator¶

Copying data from one BigQuery table to another is performed with the BigQueryToMsSqlOperator operator.

Use Jinja templating with target_table_name, impersonation_chain, dataset_id, table_id, source_project_dataset_table to define values dynamically.

You may use the parameter selected_fields to limit the fields to be copied (all fields by default), as well as the parameter replace to overwrite the destination table instead of appending to it. For more information, please refer to the links above.

Transferring data¶

The following Operator copies data from a BigQuery table to MsSQL.

tests/system/google/cloud/bigquery/example_bigquery_to_mssql.py[source]

bigquery_to_mssql = BigQueryToMsSqlOperator(
    task_id="bigquery_to_mssql",
    mssql_conn_id=CONNECTION_ID,
    source_project_dataset_table=f"{PROJECT_ID}.{BIGQUERY_DATASET_NAME}.{BIGQUERY_TABLE}",
    target_table_name=SQL_TABLE,
    replace=False,
)

Reference¶

For further information, look at: