问题:

I get the error ERROR 1066 (42000): Not unique table/alias:

I cant figure out whats wrong with it.

回答1:

Try

    SELECT pa.ProjectID, p.Project_Title, a.Account_ID, a.Username, a.Access_Type, c.First_Name, c.Last_Name       FROM Project_Assigned pa INNER JOIN Account a         ON pa.AccountID = a.Account_ID INNER JOIN Project p         ON pa.ProjectID = p.Project_ID INNER JOIN Clients c         ON a.Account_ID = c.Account_ID      WHERE a.Access_Type = 'Client';

回答2:

 select persons.personsid,name,info.id,address     -> from persons     -> inner join persons on info.infoid = info.info.id;

文章来源: Not unique table/alias

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