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  • mysql替换字段里数据内容部分字符串(亦可用于增加字段中的内容)

    mysql替换表的字段里面内容,如例子:

    mysql> select host,user from user  where user='testuser'; 
    +-----------------------+----------+
    | host                  | user     |
    +-----------------------+----------+
    | localhost.localdomain | testuser | 
    +-----------------------+----------+

    update字段host的内容,把"main"改成"slave",用REPLACE

    mysql> update user set host=REPLACE(host,'main','slave') where user='testuser';       
    Query OK, 1 row affected (0.00 sec)
    Rows matched: 1  Changed: 1  Warnings: 0

    mysql> select host,user from user  where user='testuser';                             
    +------------------------+----------+
    | host                   | user     |
    +------------------------+----------+
    | localhost.localdoslave | testuser | 
    +------------------------+----------+

    由查询结果到,数据已经更新成功

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  • 原文地址:https://www.cnblogs.com/chen-lhx/p/4015164.html
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