Question

在我的Access数据库中，我有三个（PERS，QUALIFICATION，WORKED）表，KNO是一个公共字段。我的代码在

之下

SELECT
    Pers.KNO, Pers.Name, Pers.Company
FROM
    (Pers LEFT JOIN Qualification
    ON Pers.KNO = Qualification.KNO)
    LEFT JOIN Worked
    ON Pers.KNO = Worked.KNO
WHERE
        (((Qualification.Qualification)="CCNA")
    AND ((Qualification.Grade)="A"))
    and ((Pers.Company not like 'IMDT*')
    and ( Pers.Company not like 'MZIN*'))
    and ((Worked.Company not like 'IMDT*')
    and ( Worked.Company not like 'MZIN*'))
GROUP BY Pers.KNO, Pers.Name, Pers.Company;

所有行都按预期工作但是这一行 and ((Worked.Company not like 'IMDT*') and ( Worked.Company not like 'MZIN*')) 没有提供正确的输出。根据我的代码，在名为IMDT或MZIN的公司工作的人不应该反映在我得到的输出中。

但它们包含在输出中。我怎样才能纠正它？

Answer 1

SELECT Pers.kno，Pers.Name，Pers.Company FROM WORK LEFT JOIN（Pers LEFT JOIN qualified ON Pers.kno = qualification.kno）ON working.kno = Pers.kno WHERE（（（working.Company）不喜欢“IMDT *”和（working.Company）不喜欢“MZIN *”）） GROUP BY Pers.kno，Pers.Name，Pers.Company HAVING（（（Pers.Company）不喜欢“MZIN *”和（Pers.Company）不喜欢“MZIN *”））;

在访问数据库查询中未提供所需的输出

1 个答案: