python怎么更新数据库_如何用python更新mysql数据库数据

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1级

2018-11-16 回答

mysql> show databases; // 查看当前所有的数据库

+--------------------+

| Database |

+--------------------+

| information_schema |

| csvt |

| csvt04 |

| mysql |

| performance_schema |

| test |

+--------------------+

6 rows in set (0.18 sec)

mysql> use test; //作用与test数据库

Database changed

mysql> show tables; //查看test库下面的表

Empty set (0.00 sec)

//创建user表，name 和password 两个字段

mysql> CREATE TABLE user (name VARCHAR(20),password VARCHAR(20)); Query OK, 0 rows affected (0.27 sec)

//向user表内插入若干条数据

mysql> insert into user values('Tom','1321');

Query OK, 1 row affected (0.05 sec)

mysql> insert into user values('Alen','7875');

Query OK, 1 row affected (0.08 sec)

mysql> insert into user values('Jack','7455');

Query OK, 1 row affected (0.04 sec)

//查看user表的数据

mysql> select * from user;

+------+----------+

| name | password |

+------+----------+

| Tom | 1321 |

| Alen | 7875 |

| Jack | 7455 |

+------+----------+

3 rows in set (0.01 sec)

//删除name 等于Jack的数据

mysql> delete from user where name = 'Jack';

Query OK, 1 rows affected (0.06 sec)

//修改name等于Alen 的password 为 1111

mysql> update user set password='1111' where name = 'Alen';

Query OK, 1 row affected (0.05 sec)

Rows matched: 1 Changed: 1 Warnings: 0

//查看表内容

mysql> select * from user;

+--------+----------+

| name | password |

+--------+----------+

| Tom | 1321 |

| Alen | 1111 |

+--------+----------+

3 rows in set (0.00 sec)