return selected value in stored procedure

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hi all

I Have Problem when execute Stored Procedure

when i execute the following code I get the right result :

SQL

ALTER PROCEDURE dbo.Selectplandate
	(
	@plandatefrom datetime,
	@plandateto datetime
	
	)
AS
SELECT Distinct CONVERT(datetime,plandate,103) as [Date]
FROM      plannedgangs
WHERE (plandate between @plandatefrom AND @plandateto )

but when I use this code i got wrong result : the result is null

SQL

ALTER PROCEDURE dbo.Selectplandate
	(
	@plandatefrom datetime,
	@plandateto datetime
	
	)
AS

DECLARE @plandate datetime

SET @plandate =
(
SELECT Distinct CONVERT(datetime,plandate,103) as [Date]
FROM      plannedgangs
WHERE (plandate between @plandatefrom AND @plandateto )
)
SELECT @plandate as [Date]

Posted 24-Aug-13 1:27am

shms_rony

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2 solutions

Solution 2

In solution of this question: scalar variable and any type of variable always store must be a single value at time and when you working with store procedure select statement it's returns more then one value because of that you have to declare and use table variable instead of scalar variable.

SQL

SELECT Distinct CONVERT(datetime,plandate,103) as [Date]
into #tmp
FROM      plannedgangs
WHERE (plandate between @plandatefrom AND @plandateto )

select * from #tmp

drop table #tmp

Thank you......:-)

Posted 24-Aug-13 1:59am

Chintan Desai1988

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Mike Meinz · Accepted Answer · 2013-08-24T01:32:00

My guess is that the SQL statement returns more than one row. A scalar variable can contain only one value. Use a Table variable instead.

SQL

DECLARE @t1 TABLE([date] DATETIME);
INSERT INTO @t1 ([date]) SELECT DISTINCT plandate AS [Date]
  FROM plannedgangs
  WHERE (plandate BETWEEN @plandatefrom AND @plandateto);
SELECT [Date] FROM @t1;

Assuming that plandate in plannedgangs is a DateTime Data Type, you do not need the CONVERT function. If it is not a DateTime Data Type, then the between clause will not work correctly.