Question

在这里，我已经使用MS SQL创建了一个简单的表

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());

我想对此做一个简单的select语句，根据我的局部变量的设置，在RegisterDate或ArchivedDate上进行过滤。

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，但是如果@FilterArchived设置为1，则where子句将查看{{1} }并且如果它们都设置为1，则应默认查看ArchivedColumn

我已经看了一段时间，看不到任何突出的内容。如果有人可以向我指出正确的方向，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

类似这样的东西：

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

在where子句中通过不同的日期进行过滤

3 个答案: