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监测某张表修改后自动修改另一张表的数据:
cf_userinfo的表结构:

CREATE TABLE [dbo].[cf_userinfo] (
[id] int NOT NULL IDENTITY(1,1) ,
[uid] int NOT NULL ,
[name] varchar(50) COLLATE Chinese_PRC_CI_AS NULL ,
CONSTRAINT [PK__cf_userinfo__5535A963] PRIMARY KEY ([id])
)
ON [PRIMARY]
GO

userinfo表的结构:

CREATE TABLE [dbo].[userinfo] (
[id] int NOT NULL IDENTITY(1,1) ,
[name] varchar(50) COLLATE Chinese_PRC_CI_AS NULL ,
CONSTRAINT [PK__userinfo__534D60F1] PRIMARY KEY ([id])
)
ON [PRIMARY]
GO

创建触发器对userinfo表的触发器

create trigger userinfoupdate
on userinfo for update  --监测userinfo表修改
as
if update(name) --如果name字段修改
begin
 print '触发userinfo表修改事件，修改cf_userinfo数据中……'; 
   declare  @id INT,@newName varchar(50), @UID INT;
   --更新前的userinfo表的ID
   select  @id = id from deleted; 
   if (exists (select * from cf_userinfo where uid =@id))
         begin
         --更新后的userinfo表的name字段
         select  @newName = name from inserted;
     --更新后的userinfo表的ID字段
         select  @UID = id from deleted;
         update cf_userinfo set cf_userinfo.name=@newName from userinfo where cf_userinfo.uid=@UID
         end
   else
            print '无需修改cf_userinfo表'
end