53.
Suppose tbl_1 is a table consisting of 8 rows and tbl_2 is a table consisting of 6 rows, the number of combinations through which the search is performed is . . . . . . .
SELECT tbl_1.i1, tbl_2.i2
	FROM tbl_1 INNER JOIN tbl_2
	WHERE tbl_1.i1 = tbl_2.i2;