Querying multiple repeated fields in BigQuery

Question

I have a schema that contains multiple repeated fields which are not nested.

I\'m trying to query the cross product, but I get an error: \"Cannot query the cross pr

Answer 1

You can use a nested subselect inside the FLATTEN. It requires an extra paren around the select statement. (the syntax is kind of ugly, unfortunately). e.g.

SELECT
  ...
FROM (
    FLATTEN((
      SELECT
        ...
      FROM (
          FLATTEN((
            SELECT
              ...
            FROM
              table),
            f1)
          )
        ),
      f2)
    )
  )