Join key
Stay organized with collections
Save and categorize content based on your preferences.
A set of fields that identify the records to include in a blended data source.
In a blended data source, each component data source must share one or more dimensions, known as a join key (or just a key, for short). Blended data sources include all the records from the leftmost data source in the Blend Data panel, and the matched records from the data sources to the right. In SQL terminology, this is known as a left outer join.
Except as otherwise noted, the content of this page is licensed under the Creative Commons Attribution 4.0 License, and code samples are licensed under the Apache 2.0 License. For details, see the Google Developers Site Policies. Java is a registered trademark of Oracle and/or its affiliates.
Last updated 2026-07-29 UTC.
[null,null,["Last updated 2026-07-29 UTC."],[],[]]
