SQL Server存储过程未返回值

Question

I have a table with some data and I have written a stored procedure to return a count of the rows:

ALTER PROCEDURE [dbo].[SP_User_Case_Answer_Found]
    @userID BIGINT,
    @visitID BIGINT
AS
    RETURN 
        SELECT COUNT(*) 
        FROM User_Case_Answer
        WHERE userID = @userID
          AND pvisitID = @visitID
GO

and when I execute it I get:

DECLARE @return_value int

EXEC    @return_value = [dbo].[SP_User_Case_Answer_Found]
        @userID = 26,
        @visitID = 5

SELECT  'Return Value' = @return_value
GO

But the return value = 0? I am sure the table contains data.

Answer 1

Enclose the query in parenthesis.

CREATE PROCEDURE [dbo].[SP_User_Case_Answer_Found]
    @userID BIGINT,
    @visitID BIGINT
AS
   return (SELECT count (*) 
    FROM User_Case_Answer
    WHERE userID = @userID
    AND pvisitID = @visitID)

db<>fiddle

Answer 2

Remove the return from the SELECT statement in the stored procedure. It isn't needed. You would use return if you are trying to short circuit and not return a result set or if you are returning a status code such as RETURN 1 .

   ALTER PROCEDURE [dbo].[SP_User_Case_Answer_Found]
        @userID BIGINT
        ,@visitID BIGINT
    AS
           SELECT COUNT(*) 
           FROM User_Case_Answer
           WHERE userID = @userID
               AND pvisitID = @visitID;
    GO

You don't need to bind a return value when calling the procedure either.

EXEC [dbo].[SP_User_Case_Answer_Found] @userID = 26, @visitID = 5

A return value parameter would be needed if you are using an output parameter. T-SQL RETURN