[英]Why does not this expression work in MS-ACCESS SQL View
SELECT
Pname,
Dname,
COUNT(WO.Essn),
SUM(WO.Hours)
FROM
PROJECT AS P,
WORKS_ON AS WO,
DEPARTMENT AS D
WHERE
P.Dnum = D.Dnumber
AND P.Pnumber = WO.Pno
GROUP_BY Pno
HAVING
COUNT(WO.Essn) > 1;
I am getting我正进入(状态
in query expression.
在查询表达式中。 (Error 3075)
(错误 3075)
error with this code.此代码错误。 What should I change
我应该改变什么
you're group by
statement is not correct:你的
group by
声明不正确:
SELECT
Pname,
Dname,
COUNT(WO.Essn),
SUM(WO.Hours)
FROM
PROJECT AS P,
WORKS_ON AS WO,
DEPARTMENT AS D
WHERE
P.Dnum = D.Dnumber
AND P.Pnumber = WO.Pno
GROUP BY
Pname,
Dname
HAVING
COUNT(WO.Essn) > 1;
Learn to use proper JOIN
syntax.学习使用正确的
JOIN
语法。 In MS Access, this looks like:在 MS Access 中,这看起来像:
SELECT P.Pname, D.Dname,
COUNT(WO.Essn), SUM(WO.Hours)
FROM (PROJECT AS P INNER JOIN
WORKS_ON AS WO
ON P.Pnumber = WO.Pno
) INNER JOIN
DEPARTMENT AS D
ON P.Dnum = D.Dnumber
GROUP_BY P.Pname, D.Dname
HAVING COUNT(WO.Essn) > 1;
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