update data from table

query="""
    UPDATE datalab.jmb_deliveries
    SET ot_client_order_ind = CASE
        WHEN delivery_date>promise_date THEN 0
        ELSE 1
        END
    WHERE
        client_order_ind = 1
    """
query_job = client.query(
        query,
        # Location must match that of the dataset(s) referenced in the query.
        location="EU"
        )
query_job.result(timeout=120)