google-big-queryHow do I join two tables in Google BigQuery?

Joining two tables in Google BigQuery is done using the JOIN clause. An example of how to join two tables is shown below:

SELECT *
FROM table1 t1
JOIN table2 t2
ON t1.id = t2.id

This query will return all rows from both tables that have a matching id value in both tables.

The code above is composed of the following parts:

SELECT * - This statement specifies which columns should be returned in the results. In this example, all columns will be returned.
FROM table1 t1 - This statement specifies which table should be used for the query. In this example, the table1 table will be used and will be referred to as t1 in the query.
JOIN table2 t2 - This statement specifies which table should be joined to the first table. In this example, the table2 table will be joined to table1 and will be referred to as t2 in the query.
ON t1.id = t2.id - This statement specifies the condition for the join. In this example, the join will be done on rows that have the same id value in both tables.

For more information, please see the Google BigQuery Documentation.