Given А and В tables that both contain row column. Table А contains 10 records while table В contains 5 records. How many records will the following query return?
SELECT A.row, B.row FROM A, B
SELECT ... FROM table_1, table_2
query uses cross join to link two tables (since there is no WHERE clause).
It returns a Cartesian Product of records from both tables - a result set containing table_1 * table_2 records.

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