如何修复错误代码：1054。我的sql

Question

我写下面的代码，我有错误代码：1054。未知栏＆＃39; referenceinfo.mid＆＃39;在条款＆＃39;中     create table newenron as SELECT employeelist.eid ,employeelist.firstName ,employeelist.lastName ,employeelist.Email_id ,employeelist.status ,message.mid ,message.sender ,message.subject ,message.body ,message.folder ,recipientinfo.rid ,recipientinfo.mid ,recipientinfo.rvalue ,referenceinfo.rfid ,referenceinfo.mid ,referenceinfo.reference FROM employeelist INNER JOIN message ON employeelist.Email_id = message.sender INNER JOIN recipientinfo ON message.mid = referenceinfo.mid INNER JOIN referenceinfo ON recipientinfo.rid = referenceinfo.rfid我该如何解决？ 谢谢你抽出宝贵的时间。

Answer 1

您错误拼写了一个列名。但是由此我看不出哪一个。

Answer 2

下面

public ActionResult Redirect(int id, string url)
{
   //Get record using ID, and update Hits column

   //Redirect to the final URL
   return Redirect(url);
}

您是否正在加入 recipientinfo 表格，但请参考 referenceinfo ？

据我所知，

• recipientinfo
• referenceinfo

是两个不同的表格。

你可能想要的是

 INNER JOIN recipientinfo ON message.mid = referenceinfo.mid

或

INNER JOIN recipientinfo ON message.mid = recipientinfo.mid