From 46a892a66031ae3f4103ce7b59d8af0b5a5ce04c Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E5=BA=84=E4=BA=91?= <1487274726@qq.com>
Date: Tue, 11 Oct 2022 20:41:32 +0800
Subject: [PATCH] =?UTF-8?q?=E7=AC=AC=E5=8D=81=E4=BA=8C=E6=AC=A1=E4=BD=9C?=
 =?UTF-8?q?=E4=B8=9A?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
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---
 ...0\350\247\246\345\217\221\345\231\250.sql" | 59 +++++++++++++++++++
 .../\347\254\224\350\256\260/SQL SERVER.md"   | 38 ++++++++++++
 2 files changed, 97 insertions(+)
 create mode 100644 "21\345\272\204\344\272\221/\344\275\234\344\270\232/2022-10-10\350\247\246\345\217\221\345\231\250.sql"

diff --git "a/21\345\272\204\344\272\221/\344\275\234\344\270\232/2022-10-10\350\247\246\345\217\221\345\231\250.sql" "b/21\345\272\204\344\272\221/\344\275\234\344\270\232/2022-10-10\350\247\246\345\217\221\345\231\250.sql"
new file mode 100644
index 0000000..6282e1f
--- /dev/null
+++ "b/21\345\272\204\344\272\221/\344\275\234\344\270\232/2022-10-10\350\247\246\345\217\221\345\231\250.sql"
@@ -0,0 +1,59 @@
+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"。
+go
+	create trigger tri_newpeo
+	on People for insert
+	as
+	if not exists(select * from Department where DepartmentId=(select DepartmentId from inserted))
+	begin
+	insert into Department values ((select DepartmentId from inserted),'新部门')
+	end
+	go
+	insert into People(DepartmentId,PeopleName,PeopleSex,PeopleSalary) values ('005','张三','男',5000)
+
+--（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。
+go
+	create trigger tri_deldep
+	on Department for delete
+	as
+	delete from People where DepartmentId=(select DepartmentId from deleted)
+	go
+	delete from Department where DepartmentId='005'
+--（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
+go
+	create trigger tri_deldepid
+	on Department for update
+	as
+	update People set DepartmentId=(select DepartmentId from inserted) where DepartmentId=(select DepartmentId from deleted)
+	go
+	update Department set DepartmentId='006' where DepartmentId='005'
+
+	-- 游标一般是放在存储过程中使用
+select * from Department
+select * from People
+--总经办-1000  市场部员工工资-2000
+--用存储过程和游标
+go
+create proc pro_outmon
+as
+declare cur_addmon cursor scroll for select DepartmentName  from People inner join Department on People.DepartmentId=Department.DepartmentId
+open cur_addmon
+declare @dename varchar(20)
+fetch first from cur_addmon into @dename
+while (@@FETCH_STATUS=0)
+begin
+	if @dename='总经办'
+		begin
+		 update People set PeopleSalary-=1000 where DepartmentId=(select DepartmentId from Department where DepartmentName=@dename)
+		end
+	else if @dename='市场部'
+	begin
+	 update People set PeopleSalary-=2000 where DepartmentId=(select DepartmentId from Department where DepartmentName=@dename)
+	end
+	fetch next from  cur_addmon into @dename
+end
+go
+exec pro_outmon
diff --git "a/21\345\272\204\344\272\221/\347\254\224\350\256\260/SQL SERVER.md" "b/21\345\272\204\344\272\221/\347\254\224\350\256\260/SQL SERVER.md"
index 4e21c59..348f92b 100644
--- "a/21\345\272\204\344\272\221/\347\254\224\350\256\260/SQL SERVER.md"	
+++ "b/21\345\272\204\344\272\221/\347\254\224\350\256\260/SQL SERVER.md"	
@@ -717,3 +717,41 @@ drop procedure <瀛樺偍杩囩▼鍚嶇О>
 
 
 
+### 鍗佷簩銆佽Е鍙戝櫒
+
+#### DEL瑙﹀彂鍣�
+
+1. ##### after瑙﹀彂鍣�
+
+   ###### 鍒涘缓瑙﹀彂鍣�
+
+   ```sql
+   CREATE TRIGGER <瑙﹀彂鍣ㄥ悕绉�>
+    
+   ON table_name
+   FOR [DELETE, INSERT, UPDATE]
+    
+   AS
+    
+     T-SQL璇彞
+    
+   GO
+   --WITH ENCRYPTION琛ㄧず鍔犲瘑瑙﹀彂鍣ㄥ畾涔夌殑SQL鏂囨湰
+   
+   --DELETE, INSERT, UPDATE鎸囧畾瑙﹀彂鍣ㄧ殑绫诲瀷
+   
+    1.鎻掑叆鎿嶄綔锛圛nsert锛� 
+   ***\*inserted 琛╘****鏈夋暟鎹紝***\*deleted 琛╘****鏃犳暟鎹� 
+   
+   2.鍒犻櫎鎿嶄綔锛圖elete锛� 
+   ***\*inserted 琛╘****鏃犳暟鎹紝***\*deleted 琛╘****鏈夋暟鎹� 
+   
+   3.鏇存柊鎿嶄綔锛圲pdate锛� 
+   ***\*inserted 琛╘****鏈夋暟鎹紙鏂版暟鎹級锛�***\*deleted 琛╘****鏈夋暟鎹紙鏃ф暟鎹級 
+   
+   
+   ```
+
+   
+
+2. ##### instead of瑙﹀彂鍣�
-- 
Gitee