Question

查询问题：

SELECT B.branchNo, B.city, S.staffNo, fName, lName, propertyNo
FROM Branch B, Staff S, PropertyForRent P
WHERE B.branchNo = S.branchNo AND S.staffNo = P.staffNo
ORDER BY B.branchNo, S.staffNo, propertyNo ;

错误＃1066 - 不唯一的表/别名：'B'

我对此使用了类似的查询并且它们有效，但这个问题没有。

我也尝试过：

SELECT B.branchNo, B.city, S.staffNo, S.fName, S.lName, S.propertyNo
FROM Branch B, Staff S, PropertyForRent P
WHERE B.branchNo = S.branchNo AND S.staffNo = P.staffNo
ORDER BY B.branchNo, S.staffNo, propertyNo ;

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Answer 1

显然它应该工作或者我错过了一些东西，但它很奇怪。试试这个：

SELECT B.branchNo, B.city, S.staffNo, fName, lName, propertyNo
FROM Branch B 
JOIN Staff S 
ON B.branchNo = S.branchNo 
JOIN PropertyForRent P
ON S.staffNo = P.staffNo
ORDER BY B.branchNo, S.staffNo, propertyNo

Answer 2

SELECT B.branchNo, 
       B.city, 
       S.staffNo, 
       S.fName, 
       S.lName, 
       S.propertyNo

FROM Branch B
Join Staff S
On   B.branchNo = S.branchNo

Join PropertyForRent P
On   S.staffNo = P.staffNo

ORDER BY B.branchNo, S.staffNo, S.propertyNo ;

Answer 3

尝试在您的ORDER BY中添加“S.propertyNo”：

SELECT B.branchNo, B.city, S.staffNo, S.fName, S.lName, S.propertyNo
FROM Branch B, Staff S, PropertyForRent P
WHERE B.branchNo = S.branchNo AND S.staffNo = P.staffNo
ORDER BY B.branchNo, S.staffNo, S.propertyNo ;

数据库SQL查询问题错误＃1066

3 个答案: