如何修復錯誤代碼：1054.未知的列在我的sql

Question

我寫下面的代碼，我有錯誤代碼：1054.'在子句'中的未知列'referenceinfo.mid'
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我該如何解決它？ 感謝您抽出寶貴的時間。

Answer 1

這裏

INNER JOIN recipientinfo ON message.mid = referenceinfo.mid 

要加入表recipientinfo但提及referenceinfo？

從我可以告訴，

• recipientinfo
• referenceinfo

是兩個不同的表。

你可能想要的是

INNER JOIN recipientinfo ON message.mid = recipientinfo.mid 

或

INNER JOIN referenceinfo ON message.mid = referenceinfo.mid 

Answer 2

拼寫錯誤的列名稱。但是從這我看不出哪一個。