904
904
SELECT a, MIN(b), MAX(b), AVG(b) FROM t1 GROUP BY a ORDER BY a DESC;
912
CREATE TABLE t1 (a int, b int, c int, d int,
913
KEY foo (c,d,a,b), KEY bar (c,a,b,d));
915
INSERT INTO t1 VALUES (1, 1, 1, 1), (1, 1, 1, 2), (1, 1, 1, 3), (1, 1, 1, 4);
918
INSERT INTO t1 SELECT a,b,c+1,d FROM t1;