Question

我有一个名为SurveyResponse的表，其中包含以下列

    Id                         int, not null
    SurveyId                   int, not null
    QuestionId                 int, not null
    Response                   varchar, null
    QuestionPossibleAnswerId   int, null

调查表包含以下列

    Id              int, not null
    SurveyTypeId    int, not null
    CountyId        int, not null

我们将可能的答案存储在表格中，以便调查动态创建。有些问题有一个文本框，他们可以输入一个响应，因为只有一些问题有文本框，响应字段可以为空。

我需要获得SurveyTypeId = 3的回复（3是当前年度调查）并且Response不为null且QuestionId = 6（我需要问题6的评论）。

我遇到问题的部分是我只想要那些结果，其中QuestionId = 24，QuestionPossibleAnswerId = 111.问题24询问我们是否可以分享结果，而QuestionPossibleAnswerId 111的答案是肯定的。

    select sr.Response, 
    (SELECT qpa1.PossibleAnswerText
    FROM    QuestionPossibleAnswer AS qpa1 INNER JOIN
            SurveyResponse AS sr1 ON qpa1.Id = sr1.QuestionPossibleAnswerId
    WHERE        (sr1.QuestionId = 1) AND (sr1.SurveyId = sr.SurveyId)) AS County
    FROM            SurveyResponse AS sr 
    LEFT OUTER JOIN QuestionPossibleAnswer AS qpa ON sr.QuestionPossibleAnswerId =     qpa.Id 
    INNER JOIN Survey AS s ON sr.SurveyId = s.Id 
    INNER JOIN SurveyType AS st ON s.SurveyTypeId = st.Id
    WHERE (sr.Response IS NOT NULL) AND (sr.QuestionId = 6) AND (st.Id = 3)
    ORDER BY County

这给了我问题6的响应和县名，但我需要过滤问题QuestionId = 24 AND QuestionPossibleAnswerId = 111

Answer 1

使用存在的地方。

and exists(select 1 from SurveyResponse SR2 where QuestionId = 24 and 
QuestionPossibleAnswerId = 111 and SR2.SurveyId = s.Id)

这将检查您正在考虑的调查是否有QuestionId = 24 AND QuestionPossibleAnswerId = 111.

sql查询case语句多个条件

1 个答案: