strife的专栏

代码很简单，留着复制黏贴用 --删除重复列 delete from sn where   serialnumber in (select serialnumber    from sn group by serialnumber  having count(serialnumber) > 1) and   id not in (select min(id) from sn group

按照要求装了mysql.data,mysql.data.entity, mysql-connect.net 版本6.10.4，config文件加入mysqlprovide（具体百度）发现报错 MySql.ConnectorInstaller, Version=6.10.4.0, Culture=neutral, PublicKeyToken= ... 没办法只得降低版本都装了6.8.8，然后再