SQL server 触发器（监控表数据 某字段更新后触发）

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现有业务表 Business_CustomerRisksBasicInfoStatus
程序修改其中 [HomeVisitReportCount] [LawyerLetterCount] 两列时未记日志、
由触发器实现监控目的、
具体sql如下、

创建日志记录表

CREATE TABLE [dbo].[tb_RisksStatusLog](
	[Id] [UNIQUEIDENTIFIER] NOT NULL CONSTRAINT [DF_tb_RisksStatusLog_Id]  DEFAULT (NEWID()),
	[Operate] [VARCHAR](50) NOT NULL,    ---操作
	[UpdateColumn] [VARCHAR](50) NULL,  ---修改的列
	[ApplicationNumber] [VARCHAR](50) NULL,  ---业务编号
	[OldValue] [INT] NULL,   -----旧值
	[NewValue] [INT] NULL,   -----新值
	[OperatedAt] [DATETIME] NOT NULL CONSTRAINT [DF_tb_RisksStatusLog_OperatedAt]  DEFAULT   (GETDATE())     ---修改时间
) ON [PRIMARY]

---

创建触发器

   CREATE TRIGGER [dbo].[tr_RisksBasicInfoStatus]
    ON [dbo].[Business_CustomerRisksBasicInfoStatus] AFTER UPDATE,INSERT,DELETE
    AS
    

    BEGIN 
   
      DECLARE @op VARCHAR(10)
   SELECT @op=CASE WHEN EXISTS(SELECT 1 FROM inserted) AND EXISTS(SELECT 1 FROM deleted)
                   THEN 'Update'
                   WHEN EXISTS(SELECT 1 FROM inserted) AND NOT EXISTS(SELECT 1 FROM deleted)
                   THEN 'Insert'
                   WHEN NOT EXISTS(SELECT 1 FROM inserted) AND EXISTS(SELECT 1 FROM deleted)
                   THEN 'Delete' END


       IF UPDATE(HomeVisitReportCount)  
       BEGIN
       INSERT INTO dbo.tb_RisksStatusLog
               ( 
                 Operate ,
				 UpdateColumn,
                 ApplicationNumber ,
                 OldValue ,
                 NewValue 
               ) 
         SELECT @op,'HomeVisitReportCount',n.ApplicationNum,o.HomeVisitReportCount,n.HomeVisitReportCount  
         FROM inserted n
         LEFT JOIN deleted o ON o.id=n.id
       END
   IF UPDATE(LawyerLetterCount)   
       BEGIN
       INSERT INTO dbo.tb_RisksStatusLog
               ( 
                 Operate ,
				 UpdateColumn,
                 ApplicationNumber ,
                 OldValue ,
                 NewValue 
               ) 
         SELECT @op,'LawyerLetterCount',n.ApplicationNum,o.LawyerLetterCount,n.LawyerLetterCount  
         FROM inserted n
         LEFT JOIN deleted o ON o.id=n.id
       END
    END
 

---

搞定！