1 SELECT `t1.a` FROM t_tuple_element a SELECT `t1.s` FROM t_tuple_element 1 SELECT `t1.a` FROM t_tuple_element 2 SELECT `t2.1` FROM t_tuple_element 2 SELECT `t2.1` FROM t_tuple_element 1 2 WITH (1, 2) AS t SELECT t.1, t.2 1 2 WITH CAST(\'(1, 2)\', \'Tuple(a UInt32, b UInt32)\') AS t SELECT t.1, tupleElement(t, \'b\')