1、更新整张表,如果某一行数据的某一列的值为空,那么让他和另一列字段的值相等
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UPDATE ot_tgbz set update_day=if(update_day is null , date ,update_day); |
2、更新整张表,如果某个字段大于2,那么把他们都更新成2;
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UPDATE ot_user set xingyun_num=if(xingyun_num > 2,2,xingyun_num); |
3、把shop_goods这个表里的thumb字段里的内容中含有http://www.zzvips.com/的网址全部替换成空的。
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update shop_goods set thumb= replace (thumb, 'http://www.zzvips.com/' , '' ) where thumb like '%http://www.zzvips.com/%' ; |
4、sql语句多字段where查询
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$map= " CAST( `UE_account` AS CHAR CHARACTER SET utf8 ) LIKE '%$data%' OR CAST( `UE_accName` AS CHAR CHARACTER SET utf8 ) LIKE '%$data%' OR CAST( `UE_truename` AS CHAR CHARACTER SET utf8 ) LIKE '%$data%' OR CAST( `UE_phone` AS CHAR CHARACTER SET utf8 ) LIKE '%$data%'" ; |
以上这篇mysql的sql语句特殊处理语句总结(必看)就是小编分享给大家的全部内容了,希望能给大家一个参考,也希望大家多多支持服务器之家。