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使用SQL批量替换语句修改、增加、删除字段内容 - 站长搜索
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使用SQL批量替换语句修改、增加、删除字段内容

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2022-09-23 18:10:51 转载来源: 网络整理/侵权必删

sql替换语句,用该命令可以整批替换某字段的内容,也可以批量在原字段内容上加上或去掉字符。命令总解:update表的名称set此表要替换的字段名=REPLACE(此表要替换的字段名,'原来内容','新内容')如UPDATEWhir_ProductReleseSETReleseName=REPLACE(ReleseName,'http://www.maidq.com','http://maidq.com')举例说明:1)把backupfile表里url的字段内容里为http://www.maidq.com的字符全部改为http://maidq.com

sql替换语句,用该命令可以整批替换某字段的内容,也可以批量在原字段内容上加上或去掉字符。

命令总解:update 表的名称 set 此表要替换的字段名=REPLACE(此表要替换的字段名, '原来内容', '新内容')

如 UPDATE Whir_ProductRelese SET ReleseName=REPLACE(ReleseName,'http://www.maidq.com','http://maidq.com')

举例说明:

1)把backupfile表里url的字段内容里为http://www.maidq.com的字符全部改为http://maidq.com。

 update backupfile set url=REPLACE(url,'http://www.maidq.com','http://maidq.com')

2)根据条件增加字段的内容,如把file_number=1的记录的logical_name字段的内容前面加上tmp,后面加上end。

 update backupfile set logical_name=REPLACE(logical_name,logical_name,'tmp'+logical_name+' end ') where file_number=1

3)根据条件去掉指定记录的前面2个字符。

update backupfile set logical_name=REPLACE(logical_name,logical_name,SUBSTRING(logical_name,3,len(logical_name)-2)) where file_number=1

4)根据条件去掉指定记录的后面4个字符。

update backupfile set logical_name=REPLACE(logical_name,logical_name,SUBSTRING(logical_name,1,len(logical_name)-4)) where file_number=2

如有不清楚的可以先用select语句验证是否达成自己想要的效果再进行替换:

SELECT REPLACE(替换字段,'原内容','新内容') from 表名; update 表名 set 替换字段=(REPLACE(替换字段,'原内容','新内容'))

以上所述是小编给大家介绍的使用SQL批量替换语句修改、增加、删除字段内容 ,希望对大家有所帮助,如果大家有任何疑问请给我留言,小编会及时回复大家的。在此也非常感谢大家对脚本之家网站的支持!

标签: 使用 SQL 批量 替换 语句 修改 增加 删除 字段


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