Question

我有以下条件sql语句，它有效..但我在if部分有一个空语句...我想否定它，以便我可以使用if部分与逻辑

    IF @WorkPrescribed = 1 and (@DefectNo1 = @WorkPrescribedDefectNo or @DefectNo2 = @WorkPrescribedDefectNo or @DefectNo3 = @WorkPrescribedDefectNo or @DefectNo4 = @WorkPrescribedDefectNo)
  BEGIN
            -- I don't want this at all.. only reason I have this is so I can have the else condition
  END
    else
        BEGIN
             --My current logic is all here
        END

所以我只想知道如何否定我拥有的东西，所以我可以用if做一切，而不是使用else

由于

Answer 1

也许只是

IF NOT(@WorkPrescribed = 1 and (@DefectNo1 = @WorkPrescribedDefectNo or @DefectNo2 = @WorkPrescribedDefectNo or @DefectNo3 = @WorkPrescribedDefectNo or @DefectNo4 = @WorkPrescribedDefectNo))

Answer 2

您可以通过用NOT()括起来简单地否定逻辑，或者您可以这样写：

IF @WorkPrescribed != 1 or (@DefectNo1 != @WorkPrescribedDefectNo and @DefectNo2 != @WorkPrescribedDefectNo and @DefectNo3 != @WorkPrescribedDefectNo and @DefectNo4 != @WorkPrescribedDefectNo)
    BEGIN
         --My current logic is all here
    END

Answer 3

将NOT“放在”要被否定的陈述周围：

IF NOT (@WorkPrescribed = 1 and (@DefectNo1 = @WorkPrescribedDefectNo or @DefectNo2 = @WorkPrescribedDefectNo or @DefectNo3 = @WorkPrescribedDefectNo or @DefectNo4 = @WorkPrescribedDefectNo))
  BEGIN
            -- I don't want this at all.. only reason I have this is so I can have the else condition
  END
    else
        BEGIN
             --My current logic is all here
        END

Answer 4

您可以使用IF @WorkPrescribed <> 1代替=运营商

查看这篇文章。 Should I use != or <> for not equal in TSQL?

或者您可以使用

IF NOT @WorkPrescribed = 1 and 
(@DefectNo1 = @WorkPrescribedDefectNo or 
 @DefectNo2 = @WorkPrescribedDefectNo or 
 @DefectNo3 = @WorkPrescribedDefectNo or 
 @DefectNo4 = @WorkPrescribedDefectNo)

Answer 5

IF @WorkPrescribed <> 1 
or @WorkPrescribedDefectNo not in (@DefectNo1, @DefectNo2, @DefectNo3, @DefectNo4)
BEGIN
 -- code
END

如何否定以下SQL语句？

5 个答案: