Google BigQuery doesn't support automatic transactions. This means, adding the begin transaction and commit transaction SQL causes the following error.
Document Execution Failed: One or more dataset reports returned an error. Datatypes-DateTimes [B0DA15EA461EE5A574C6C395B7EA0A96]: (Error in Process method of Component: QueryEngineServer, Project Strategy Tutorial, Job 2271, Error Code = -2147212287.)

Starting in Strategy 2021 Update 3, the VLDB setting, No Atomic Transaction Management, is added to the DBRole/DBMS level to omit begin transaction/commit transaction keywords.
Note: The new setting is only applicable if you are upgrading from Strategy 2021 Update 2 to Strategy 2021 Update 3. If you are already using Strategy 2021 Update 3, you do not need to do anything.
To apply the No Atomic Transaction Management setting, you must manually load the DBMS object and restart the Intelligence Server.

If you are using a version prior to Strategy 2021 Update 3 and not plan to upgrade, refer to the following steps to work around this issue.
regedit.exefile.
HKLM/SOFTWARE/ODBC/ODBC.INI/<Your GBQ DSN>.
C:\Program Files (x86)\Common Files\MicroStrategy\ODBCand locate the folder with your driver type. For example,
BigQuery.
C:\Program Files (x86)\Common Files\MicroStrategy\ODBC, create a folder with your driver's name, followed by
.new. For example,
BigQuery.new.
BigQuery.old.
BigQuery.