Tsql翻译

Question

我有一张像

这样的表格

Id | IsActive
1  | True
2  | False

我想搜索有效，无效或两者兼有的项目

我想查询

声明@ActiveState位

从myTable中选择*，其中IsActive ...

在我的where子句中我希望有类似

的内容

if(@ActiveState != null)
    myTable.IsActive == @ActiveState
else
    myTable.ActiveState == true || myTable.ActiveState == false

但我无法找到在同一个where子句

上执行此操作的方法

TKS

Answer 1

select * from myTable where @ActiveState is null or IsActive = @ActiveState

Answer 2

WHERE myTable.IsActive  = @ActiveState OR @ActiveState IS NULL

Answer 3

Where IsActive = IsNull(@ActiveState, IsActive)
或
Where IsActive = Coalesce(@ActiveState, IsActive)