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17.更新和删除数据
更新： update table set columns = ‘value’ where ...
mysql> update pw_price set price=10000 where uid=6; Query OK, 1 row affected (0.03 sec) Rows matched: 1 Changed: 1 Warnings: 0 mysql> select * from pw_price; +-----+-------+------------+ | uid | price | first_name | +-----+-------+------------+ | 1 | 100 | wang | | 2 | 1000 | zhang | | 3 | 2000 | li | | 4 | 5000 | weizhi | | 5 | 5000 | cai | | 6 | 10000 | guo | +-----+-------+------------+ 6 rows in set (0.00 sec)
mysql> update pw_price set first_name="guo6" where uid = 6; Query OK, 1 row affected (0.03 sec) Rows matched: 1 Changed: 1 Warnings: 0 mysql> select * from pw_price; +-----+-------+------------+ | uid | price | first_name | +-----+-------+------------+ | 1 | 100 | wang | | 2 | 1000 | zhang | | 3 | 2000 | li | | 4 | 5000 | weizhi | | 5 | 5000 | cai | | 6 | 10000 | guo6 | +-----+-------+------------+ 6 rows in set (0.00 sec)
删除数据
delete from table where 。。。
mysql> select * from pw_price; +-----+-------+------------+ | uid | price | first_name | +-----+-------+------------+ | 1 | 100 | wang | | 2 | 1000 | zhang | | 3 | 2000 | li | | 4 | 5000 | weizhi | | 5 | 5000 | cai | | 6 | 10000 | guo6 | +-----+-------+------------+ 6 rows in set (0.00 sec) mysql> delete from pw_price where uid >=6; Query OK, 1 row affected (0.03 sec) mysql> select * from pw_price; +-----+-------+------------+ | uid | price | first_name | +-----+-------+------------+ | 1 | 100 | wang | | 2 | 1000 | zhang | | 3 | 2000 | li | | 4 | 5000 | weizhi | | 5 | 5000 | cai | +-----+-------+------------+ 5 rows in set (0.00 sec)
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原文地址：http://www.cnblogs.com/wjw334/p/4305400.html
