Answer by Elliott Brossard for How to sort an array in BigQuery standard SQL?

Sure, you can use the ARRAY function. It supports an optional ORDER BY clause. You haven't provided sample data, but supposing that you have a top level array column named arr, you can do something like this:

SELECT  col1,  col2,  ARRAY(SELECT x FROM UNNEST(arr) AS x ORDER BY x) AS arrFROM MyTable;

This sorts the elements of arr by their values.

If you actually have an array of a struct type, such as ARRAY<STRUCT<a INT64, b STRING>>, you can sort by one of the struct fields:

SELECT  col1,  col2,  ARRAY(SELECT x FROM UNNEST(arr) AS x ORDER BY a) AS arrFROM MyTable;