通过 where 子句中的不同日期过滤

Question

我在这里使用 MS SQL

创建了一个简单的 table

CREATE TABLE Students1 (
FirstName Nvarchar(100),
SecondName Nvarchar(100),
DOB Smalldatetime,
RegisterDate smalldatetime,
Archived int,
ArchivedDate Smalldatetime
);

Insert Into Students1(FirstName,SecondNAme,DOB,RegisterDate,Archived,ArchivedDate)
Values('James','Bike',16/04/1900, 04/07/2017,0,Null);
Insert Into Students1(FirstName,SecondNAme,DOB,RegisterDate,Archived,ArchivedDate)
Values('Adam','Bike',16/04/1901,04/07/2017,0,Null);
Insert Into Students1(FirstName,SecondNAme,DOB,RegisterDate,Archived,ArchivedDate)
Values('Chris','Bike',16/04/1902,04/09/2017,1,getdate());
Insert Into Students1(FirstName,SecondNAme,DOB,RegisterDate,Archived,ArchivedDate)
Values('Sam','Bike',16/04/1999,04/09/2017,1,getdate());
Insert Into Students1(FirstName,SecondNAme,DOB,RegisterDate,Archived,ArchivedDate)
Values('Josh','Bike',16/04/1999,04/09/2017,1,getdate());

我想针对此做一个简单的 select 声明，我根据我的局部变量的设置方式过滤 RegisterDate 或 ArchivedDate。

例如，我将设置以下局部变量； @FitlerRegisterDate @FilterArchived 如果 @FilterREgisterDate 设置为 1，则 where 子句将查看 RegisterDate 列，但如果 @FilterArchived 设置为 1，则 where 子句将查看 ArchivedColumn 如果它们都设置为 1 那么它应该默认查看 RegisterDate

我已经看了一段时间了，看不出有什么突出的地方。如果有人能给我指出正确的方向，那就太好了。

谢谢。

Answer 1

您可以使用 AND 和 OR 子句根据您的变量值进行过滤：

SELECT *
FROM   dbo.Students1
WHERE  (    @FilterArchived     = 1 
        AND @FilterREgisterDate = 1 
        AND RegisterDate        = @dateToFilter )
  OR (   (    @FilterREgisterDate = 1 
          AND RegisterDate        = @dateToFilter )
      OR (    @FilterArchived = 1 
          AND ArchivedDate    = @dateToFilter ) )

Answer 2

像这样：

SELECT *
  FROM Students1
 WHERE @FilterREgisterDate = 1 AND RegisterDate = @RegisterDate
       OR @FilterREgisterDate <> 1 AND @FilterArchived = 1 AND ArchivedDate = @ArchivedDate
;

?

Answer 3

select * from dbo.Students1 where (@FilterArchived=1 AND @FilterREgisterDate=1) and registerdate='04/07/2017'

UNION 

select * from dbo.Students1 where (@FilterArchived!=1 AND @FilterREgisterDate=1) and registerdate='04/07/2017'

UNION

select * from dbo.Students1 where  (@FilterArchived=1 AND @FilterREgisterDate!=1) and archived=1

通过 where 子句中的不同日期过滤

Filter via different dates in where clause

sql

sql-server

where