mysql sql执行时间查询

mysql sql执行时间查询

第一种：

开启profile

mysql> set profiling=1;
Query OK, 0 rows affected (0.00 sec)
eg：
mysql> select * from test_1;
mysql> show profiles;
+----------+------------+----------------------+
| Query_ID | Duration   | Query                |
+----------+------------+----------------------+
|        1 | 0.84718100 | select * from test_1 |
+----------+------------+----------------------+
1 row in set (0.00 sec)

第二种：(通过时间差查看)

delimiter // set @d=now();
select * from comment;
select timestampdiff(second,@d,now());
delimiter ;


Query OK, 0 rows affected (1 min 55.58 sec)


+----------------------------------+
| timestampdiff(second, @d, now()) |
+----------------------------------+
|                                2 |
+----------------------------------+
1 row in set (1 min 55.58 sec)