In SQL Server 2008 (TSQL), I\'ve created a stored procedure like this:
CREATE PROCEDURE SP_1_10_2
AS
declare @mostValuableBook nvarchar(255)
SELECT @mostValu
RETURN
cannot be used to return nvarchar
/ varchar
such as you have. RETURN is used to return an integer, this can be expressed as some sort of status code 1=True / 0=False. Read more about return here: http://msdn.microsoft.com/en-us/library/ms174998.aspx
In your case, you simply need to use OUTPUT
variables which is similiar to pass-by-ref in C# or C++. You pass the variable to the sproc, the sproc modifies it, and you get the expected results after a SELECT...
.
Change it so that your parameters becomes an output parameter:
CREATE PROCEDURE SP_1_10_2
@mostValueableBook nvarchar(255) output
AS
SELECT @mostValuableBook = Name
FROM books
WHERE price =
( SELECT MAX(price)
FROM books
WHERE izd LIKE '%BHV%' );
SELECT @mostValuableBook
GO
Call it like so:
DECLARE @theValBook nvarchar(255)
EXECUTE SP_1_10_2 @mostValuableBook = @theValBook output
Then you can say:
SELECT 'Most expensive book is', @theValBook
You can also create a function to return the value you desire instead of relying on numeric return codes. SQL Functions come in quite handy. See example below which returns the last name with the highest client id using the LIKE operator
Use MYDB
GO
CREATE Function fn_LastClientIdByName
(
@nameLike NVARCHAR(10)
)
RETURNS NVARCHAR(100)
AS
BEGIN
DECLARE @result nvarchar(100)
DECLARE @clientName NVARCHAR(100)
SELECT top 1 @clientName = [clientLast] + ' ' + [clientFirst]
FROM [dbo].[duiClientOnly]
WHERE clientLast like @nameLike + '%'
order by clid desc
select @result = @clientName
return @result
END