Question

LocationID  LocationName
50          Sharjah
51          Qatar
55          Rigga
6           Dubai Mall

我需要创建以locationId为参数的sql查询，如果locationId传递0，那么我想显示所有这些记录，否则按照locationId传递。我尝试过case case但没有成功。

Answer 1

试试这个：这里@Parm会将值传递给您的脚本

SELECT * 
FROM TableName
WHERE (@Parm = 0 OR LocationID = @Parm)

Answer 2

DECLARE @locationId INT;

SELECT LocationID, LocationName
FROM yourTable
WHERE @locationId = 0 OR LocationID = @locationId

Answer 3

我为你创建了一个存储过程。

CREATE TABLE #LOCATIONS
(
    LocationID  INT
    ,LocationName VARCHAR(100)
) 

INSERT INTO #LOCATIONS VALUES(
50,'Sharjah')
,(51,'Qatar')
,(55,'Rigga')
,(6,'Dubai Mall')

SELECT * FROM #LOCATIONS
GO

CREATE PROC LOC ( @LOC_ID INT )
AS
BEGIN

    IF(@LOC_ID = 0)
        SELECT * FROM #LOCATIONS
    ELSE

    SELECT * FROM #LOCATIONS WHERE LocationID = @LOC_ID
END
GO

EXEC LOC 0 -- Try Executing the stored proc like this
EXEC LOC 55 -- Try Executing the stored proc like this

用于整数值的大小写

3 个答案: