Question

我有两个表“问答”。问题表的列为“ QuestionType”，如果问题的类型为文本，则其值为1；如果问题具有预定义的答案选项（例如，单选，下拉菜单），则值为2。

我正在尝试使用T-SQL，如果答案有价值，我只需要针对问题回答。现在，对于QuestionType，如果value为null或为空，则意味着没有答案将被填满，但对于QuestionType 2，即使存在答案，它也将始终为null，因为存在另一个包含该信息的表。

我需要存在值的Answer，即使在Answer中为Null值，也需要questionType为2

我这样做了，但条件排除了我不想要的QuestionType 2

FROM [dbo].[MyTable] AS sur
INNER JOIN [dbo].[SurveyQuestions] AS surQus ON sur.Id = surQus.SurveyId
INNER JOIN [dbo].[Questions] AS qus ON surQus.QuestionId = qus.Id
LEFT JOIN [dbo].[Responses] AS res ON res.SurveyId = sur.Id
LEFT JOIN [dbo].[Answers] AS ans ON res.Id = ans.ResponseId AND qus.Id = ans.QuestionId 
LEFT JOIN [dbo].[AnswerOptions] AS ansOpt ON ans.Id = ansOpt.AnswerId
LEFT JOIN [dbo].[QuestionOptions] AS qusOpt ON ansOpt.QuestionOptionId = qusOpt.Id
 WHERE con.Id = '00000011-0013-4D34-8888-7E7189CA348U'
    AND (qus.QuestionType ='1' AND ans.Value IS NOT NULL ) //???????? NEED HELP HERE

Answer 1

如果我理解您的问题，则需要一个OR语句，每组条件都在各自的括号中，并由一组主要的括号包围。

FROM [dbo].[MyTable] AS sur
INNER JOIN [dbo].[SurveyQuestions] AS surQus ON sur.Id = surQus.SurveyId
INNER JOIN [dbo].[Questions] AS qus ON surQus.QuestionId = qus.Id
LEFT JOIN [dbo].[Responses] AS res ON res.SurveyId = sur.Id
LEFT JOIN [dbo].[Answers] AS ans ON res.Id = ans.ResponseId AND qus.Id = ans.QuestionId 
LEFT JOIN [dbo].[AnswerOptions] AS ansOpt ON ans.Id = ansOpt.AnswerId
LEFT JOIN [dbo].[QuestionOptions] AS qusOpt ON ansOpt.QuestionOptionId = qusOpt.Id
 WHERE con.Id = '00000011-0013-4D34-8888-7E7189CA348U'
    AND (
        (qus.QuestionType ='1' AND ans.Value IS NOT NULL )
        OR
        (qus.QuestionType ='2')
        )

如何在T-SQL中应用多个合并条件，而又不让这些条件单独影响结果

1 个答案: