In SQL, CROSS JOINs are used to combine each row of one table with each row of another table, and return the Cartesian product of the sets of rows from the tables that are joined. When to use the CROSS JOIN? The CROSS JOIN query in SQL is used to generate all combinations of records in two tables.

In SQL, CROSS JOINs are used to combine each row of one table with each row of another table, and return the Cartesian product of the sets of rows from the tables that are joined. When to use the CROSS JOIN? The CROSS JOIN query in SQL is used to generate all combinations of records in two tables.

Cross join, or Cartesian join, combines every row from one table with every row from another table, resulting in a table with all possible combinations. It is used when there is no common column between the tables. The resulting table has a row count equal to the product of the row counts of the joined tables.