If else in stored procedure sql server

Question

I have created a stored procedure as follow:

Create Procedure sp_ADD_USER_EXTRANET_CLIENT_INDEX_PHY
(
@ParLngId int output
)
as
Begin
    SET @ParLngId = (Select         


        

Answer 1

Try this one -

CREATE PROCEDURE sp_ADD_USER_EXTRANET_CLIENT_INDEX_PHY
AS
BEGIN

    DECLARE @ParLngId INT
    SELECT TOP 1 @ParLngId = ParLngId
    FROM dbo.T_Param
    WHERE ParStrNom = 'Extranet Client'

    IF (@ParLngId = 0)
    BEGIN
        INSERT INTO dbo.T_Param
        VALUES ('PHY', 'Extranet Client', NULL, NULL, 'T', 0, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, 1, NULL, NULL, NULL)

        RETURN SCOPE_IDENTITY()
    END
    ELSE BEGIN

        RETURN @ParLngId 

    END

END