diff --git "a/12 \351\231\210\345\215\216\344\274\237/2022-10-10 \347\254\254\345\215\201\344\270\211\346\254\241\344\275\234\344\270\232\345\222\214\347\254\224\350\256\260/SQLQuery13.sql" "b/12 \351\231\210\345\215\216\344\274\237/2022-10-10 \347\254\254\345\215\201\344\270\211\346\254\241\344\275\234\344\270\232\345\222\214\347\254\224\350\256\260/SQLQuery13.sql"
new file mode 100644
index 0000000000000000000000000000000000000000..e9e063ad16bad6e3358768ffe0657de633a761be
--- /dev/null
+++ "b/12 \351\231\210\345\215\216\344\274\237/2022-10-10 \347\254\254\345\215\201\344\270\211\346\254\241\344\275\234\344\270\232\345\222\214\347\254\224\350\256\260/SQLQuery13.sql"	
@@ -0,0 +1,89 @@
+use master
+--部门
+create table Department
+(
+	DepartmentId varchar(10) primary key , --主键，自动增长
+	DepartmentName nvarchar(50), --部门名称
+)
+go
+--人员信息
+create table People
+(
+	PeopleId int primary key identity(1,1), --主键,自动增长
+	DepartmentId varchar(10), --部门编号,外键,与部门表关联
+	PeopleName nvarchar(20), --人员姓名
+	PeopleSex nvarchar(2), --人员性别
+	PeopleSalary money, --薪水
+)
+go
+insert into Department(DepartmentId,DepartmentName)
+values('001','总经办')
+insert into Department(DepartmentId,DepartmentName)
+values('002','市场部')
+insert into Department(DepartmentId,DepartmentName)
+values('003','人事部')
+insert into Department(DepartmentId,DepartmentName)
+values('004','财务部')
+go
+insert into People(DepartmentId,PeopleName,PeopleSex,PeopleSalary)
+values('001','刘备','男',8000)
+insert into People(DepartmentId,PeopleName,PeopleSex,PeopleSalary)
+values('001','关羽','男',5000)
+insert into People(DepartmentId,PeopleName,PeopleSex,PeopleSalary)
+values('002','张飞','男',3000)
+insert into People(DepartmentId,PeopleName,PeopleSex,PeopleSalary)
+values('003','赵云','男',5000)
+insert into People(DepartmentId,PeopleName,PeopleSex,PeopleSalary)
+values('004','马超','男',7000)
+
+drop  table   Department
+drop  table People
+select * from Department
+select * from People
+--（1）假设有部门表和员工表，在添加员工的时候，该员工的部门编号如果在部门表中找不到
+--，则自动添加部门信息，部门名称为"新部门"
+     select * from People
+  
+  create trigger tri_insert
+   on People for insert
+   as
+   	declare @new varchar(20)
+	select @new = PeopleId from inserted
+	if not exists (select * from Department where DepartmentId = @new)
+	begin
+	 insert into Department values(@new,'新部门')
+	 end;
+
+	    insert into People  values ('007','说的是','男',5000);
+		insert into People  values ('008','大蛇丸','男',7000);
+
+--（2）触发器实现，删除一个部门的时候将部门下所有员工全部删除
+	drop trigger tri_delete
+
+	create trigger tri_delete
+	on Department for delete 
+	as 
+	delete from People where DepartmentId= (select DepartmentId from deleted) 
+
+	delete from Department where DepartmentId='004'
+
+--（4）修改一个部门编号之后，将该部门下所有员工的部门编号同步进行修改	
+		--有缺陷
+
+	drop trigger tri_update 
+	select * from Department
+    select * from People
+
+	create trigger tri_update 
+	on Department  for update
+	as
+	declare @oldid varchar(20), @newid varchar(20)
+
+	select @oldid=  DepartmentId from deleted
+    select @newid=  DepartmentId from inserted
+   -- update Department set DepartmentId =@oldid where DepartmentId=@newid --没什么用
+	print '旧:'+@oldid + char(9) + '新:'+@newid
+
+	update Department set DepartmentId = '006' where DepartmentId='001'		--有缺陷
+	update People set DepartmentId = '006' where DepartmentId='001'		--有缺陷
+
diff --git "a/12 \351\231\210\345\215\216\344\274\237/2022-10-10 \347\254\254\345\215\201\344\270\211\346\254\241\344\275\234\344\270\232\345\222\214\347\254\224\350\256\260/\350\247\246\345\217\221\345\231\250.sql" "b/12 \351\231\210\345\215\216\344\274\237/2022-10-10 \347\254\254\345\215\201\344\270\211\346\254\241\344\275\234\344\270\232\345\222\214\347\254\224\350\256\260/\350\247\246\345\217\221\345\231\250.sql"
new file mode 100644
index 0000000000000000000000000000000000000000..a9b577f699a79271ebdf74cf101c1d54bdec3ed3
--- /dev/null
+++ "b/12 \351\231\210\345\215\216\344\274\237/2022-10-10 \347\254\254\345\215\201\344\270\211\346\254\241\344\275\234\344\270\232\345\222\214\347\254\224\350\256\260/\350\247\246\345\217\221\345\231\250.sql"	
@@ -0,0 +1,62 @@
+select * from Department
+select * from People
+
+--触发器(trigger)
+--创建触发器，往部门表插入一条数据('005','软件部')  之后 --- >自动执行的 输出新插入部门的id和部门名称。
+go
+--after
+create trigger tri_PrintDepartmentName
+on Department for insert
+as
+	
+	declare @name varchar(20), @id varchar(20)
+	--找到刚刚插入的这个信息  inserted:受影响行数的中的结果集
+	select @name = DepartmentName, @id=DepartmentId from inserted
+	print @name + char(9) + @id
+go
+
+insert into Department values('006','测试部')
+update Department set DepartmentName='开发部' where DepartmentId='006'
+
+--drop trigger tri_PrintDepartmentName
+
+
+--插入一个新员工  并输出该员工的基本信息
+create trigger tri_CheckSalary
+on People for insert
+as
+	declare @salary money
+	select @salary = PeopleSalary from inserted
+	if(@salary>3000)
+		begin
+			update People set PeopleSalary=3000 where PeopleId = (select PeopleId from inserted)
+		end
+
+insert into People(DepartmentId,PeopleName,PeopleSalary) values('005','赵云',9000)
+
+--after: delete
+--创建触发器实现，删除一个部门时（市场部），将该部门下的员工一起删除。(两张表无外键关联)
+create trigger tri_DeletePeopleByDepartment
+on Department for delete
+as
+	--删员工
+	delete from People where DepartmentId = (select DepartmentId from deleted)    --updated
+
+delete from Department where DepartmentId = '005'
+
+
+--创建触发器实现，当修改某员工工资后，输出该雇员的姓名，更新前工资和更新后工资
+--(测试数据:将001的工资加2000)
+
+create trigger tri_PrintSalary 
+on People for update
+as
+	declare @oldmon varchar(20), @newmon varchar(20)
+	--老的结果集会存到deleted
+	select @oldmon = PeopleSalary  from deleted  
+	--新的结果集会存到inserted
+	select @newmon = peopleSalary from inserted
+	print '旧的工资:'+@oldmon + char(9) + '新的工资:'+@newmon
+
+
+update People set PeopleSalary -= 2000  where PeopleId = 001