触发器小例子，oh no oh yes fuck

USE [C630SP2_ShenZhenBaiKeShengYe]
GO
/****** Object:  Trigger [dbo].[SapChangeUpdateC6]    Script Date: 05/29/2012 16:36:39 ******/
SET ANSI_NULLS ON
GO
SET QUOTED_IDENTIFIER ON
GO
--触发器定义: 当sap向中间表Sap_ExpReList更新字段TransId值时，
--将该字段值同步更新到C6费用报销单主表form_ys_paymentexpense的TransId字段
ALTER TRIGGER [dbo].[SapChangeUpdateC6] ON [dbo].[Sap_ExpenseReimbursement]
AFTER UPDATE
AS
--存在form_ys_paymentexpense 的ID与Sap_ExpReList表被更新的ID相同
IF EXISTS(SELECT * FROM DELETED A,form_ys_paymentexpense B WHERE A.[ID]=B.ID)
   BEGIN
      --随之form_ys_paymentexpense值更新为Sap_ExpReList新更新的值
      UPDATE form_ys_paymentexpense SET TransId=INSERTED.TransId
      FROM INSERTED
      WHERE form_ys_paymentexpense.ID=INSERTED.[ID]
   END
--ELSE --不存在相同ID
--BEGIN
--   插入
--   INSERT INTO form_ys_paymentexpense SELECT * FROM INSERTED
--END