时间:2021-07-01 10:21:17 帮助过:56人阅读
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
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;
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//www.gxlcms.com/的网址全部替换成空的。
update shop_goods set thumb= replace (thumb,'//www.gxlcms.com/','') where thumb like '%//www.gxlcms.com/%';
4、sql语句多字段where查询
$map= " CAST( `UE_account` AS CHAR CHARACTER SET utf8 ) LIKE '%$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脚本之家。