MySQL 清空表的内容

（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>