不是唯一的表/别名

一尘不染

不是唯一的表/别名

mysql

我得到错误 ERROR 1066 (42000): Not unique table/alias:

我不知道这是怎么回事。

SELECT Project_Assigned.ProjectID, Project_Title, Account.Account_ID, Username, Access_Type
FROM Project_Assigned 
JOIN Account 
  ON Project_Assigned.AccountID = Account.Account_ID
JOIN Project
  ON Project_Assigned.ProjectID = Project.Project_ID
where Access_Type = 'Client';

阅读 292

2020-05-17

共1个答案

一尘不染

尝试

    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';

2020-05-17