存储过程更新问题

Question

存储过程工作但什么都不更新！我认为是关于那些陈述
如果@ ... <> null。

感谢帮助

ALTER PROCEDURE [dbo].[sp_UpdateLocation] 

    @id_Location char(6), 
    @debut_Location smalldatetime, 
    @premier_Paiement smalldatetime, 
    @nombre_Mensualité char(2), 
    @id_Client char(6), 
    @no_Termes_location char(6), 
    @niv char(20) 

AS 

BEGIN 


IF @nombre_Mensualité <> null 
    BEGIN 

     DECLARE @valeur_auto smallmoney; 
     DECLARE @paiment_Mensuel smallmoney; 
     SET @valeur_auto= (SELECT valeur FROM Véhicules where niv=@niv) 
     SET @paiment_Mensuel= (@valeur_auto/@nombre_Mensualité) 

     Update Location 
     SET paiment_Mensuel=@paiment_Mensuel,nombre_Mensualité=@nombre_Mensualité 
     WHERE (@id_Location=id_Location) 
    END 

IF @debut_Location <> null 
    BEGIN 
     Update Location 
     SET debut_Location=@debut_Location 
     WHERE @id_Location=id_Location 
    END 

IF @premier_Paiement <> null 
     BEGIN 
      Update Location 
      SET premier_Paiement=@premier_Paiement 
      WHERE @id_Location=id_Location 
     END 

IF @id_Client <> null 
     BEGIN 
      Update Location 
      SET id_Client=@id_Client 
      WHERE @id_Location=id_Location 
     END 

IF @no_Termes_location <> null 
     BEGIN 
      Update Location 
      SET no_Termes_location=@no_Termes_location 
      WHERE @id_Location=id_Location 
     END 

IF @niv <> null 
     BEGIN 
      Update Location 
      SET niv=@niv 
      WHERE @id_Location=id_Location 
     END 



     END 

     select*from Location 

Answer 1

而不是<> null尝试IS NOT NULL。

MSDN是一个很好的资源来咨询这些类型的问题。