54
54
INSERT INTO t1 SET id2=0;
60
60
DELETE FROM t1 WHERE id2 = 0 ORDER BY id LIMIT 1;
65
65
DELETE FROM t1 WHERE id2 = 0 ORDER BY id desc LIMIT 1;
71
80
insert into t1 values (1),(2),(3),(4),(5),(6),(7);
72
81
explain select count(*) c FROM t1 WHERE a > 0 ORDER BY c LIMIT 3;