sql-server - 如何否定下面的 SQL 语句？

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 部分的逻辑

    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所拥有的，所以我可以只用 If 做所有事情，而不是使用 else

谢谢

Answer 1

也许只是简单

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

Answer 2

你可以简单地用 a 括起来否定逻辑NOT()，或者你可以这样写：

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

只需NOT“围绕”要否定的声明：

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而不是=运算符

检查这篇文章。 我应该在 TSQL 中使用 != 或 <> 来表示不相等吗？

或者你可以使用

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