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Sep
29
2018
MySQL 查询重复记录
Posted by mysql-云栖社区 on Sat 29 Sep 2018 01:33 UTC
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版权声明：本文首发 http://asing1elife.com ，转载请注明出处。 https://blog.csdn.net/asing1elife/article/details/82892848 ...

【mysql】  【数据库】  【BY】  【co】  【Group】  【Blog】   点击查看原文>

Nov
08
2017
MySQL can’t specify target table for update in FROM clause
Posted by mysql-云栖社区 on Wed 08 Nov 2017 08:23 UTC
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 翻译：MySQL不能指定更新的目标表在FROM子句 源SQL语句：

1 2 3

SQL>

delete from t_official_sys_user  

where USER_NAME IN(SELECT USER_NAME FROM t_official_sys_user b group by b.

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Nov
06
2017
MySQL计算百分比方法介绍
Posted by mysql-云栖社区 on Mon 06 Nov 2017 12:50 UTC
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根据相应条件抽出相应count数（myCount） 抽出总count数(totalCount) 计算百分比：myCount / totalCount * 100 四舍五入：使用ROUND函数ROUND(number，要保留的小数位)，ROUND(myCount / totalCount * 100,1) 下面给出示例供参考：     SELECT ROUND(T1.

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