(1)delete form 表名,清空表的内容
mysql> use test; Database changed mysql> create table teacher(age int(3)); Query OK, 0 rows affected (0.07 sec) mysql> insert into teacher values(111), (45), (23), (34); Query OK, 4 rows affected (0.04 sec) Records: 4 Duplicates: 0 Warnings: 0 mysql> select * from teacher; +------+ | age | +------+ | 111 | | 45 | | 23 | | 34 | +------+ 4 rows in set (0.00 sec) mysql> delete from teacher; Query OK, 4 rows affected (0.03 sec) mysql> select * from teacher; Empty set (0.00 sec) mysql>
(2)truncate 表名,清空表的内容
mysql> use test; Database changed mysql> create table teacher(age int(3)); Query OK, 0 rows affected (0.05 sec) mysql> insert into teacher values(111), (45), (23), (34); Query OK, 4 rows affected (0.03 sec) Records: 4 Duplicates: 0 Warnings: 0 mysql> select * from teacher; +------+ | age | +------+ | 111 | | 45 | | 23 | | 34 | +------+ 4 rows in set (0.00 sec) mysql> truncate teacher; Query OK, 0 rows affected (0.11 sec) mysql> select * from teacher; Empty set (0.00 sec) mysql>