From e8ad2c6de5fd6923139374b1ade1bbee5131a03e Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E6=88=B4=E4=BF=8A=E9=94=8B?=
 <95995809+zzzzzzz123000@users.noreply.github.com>
Date: Tue, 11 Oct 2022 19:09:32 +0800
Subject: [PATCH] =?UTF-8?q?=E7=AC=AC=E5=8D=81=E4=BA=8C=E6=AC=A1?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 ...-\350\247\246\345\217\221\345\231\250.sql" | 55 +++++++++++++++++++
 ...--\350\247\246\345\217\221\345\231\250.md" | 54 ++++++++++++++++++
 2 files changed, 109 insertions(+)
 create mode 100644 "25\346\210\264\344\277\212\351\224\213/\344\275\234\344\270\232/2022.10.10\344\275\234\344\270\232--\350\247\246\345\217\221\345\231\250.sql"
 create mode 100644 "25\346\210\264\344\277\212\351\224\213/\347\254\224\350\256\260/2022.10.10\347\254\224\350\256\260--\350\247\246\345\217\221\345\231\250.md"

diff --git "a/25\346\210\264\344\277\212\351\224\213/\344\275\234\344\270\232/2022.10.10\344\275\234\344\270\232--\350\247\246\345\217\221\345\231\250.sql" "b/25\346\210\264\344\277\212\351\224\213/\344\275\234\344\270\232/2022.10.10\344\275\234\344\270\232--\350\247\246\345\217\221\345\231\250.sql"
new file mode 100644
index 0000000..cf46e97
--- /dev/null
+++ "b/25\346\210\264\344\277\212\351\224\213/\344\275\234\344\270\232/2022.10.10\344\275\234\344\270\232--\350\247\246\345\217\221\345\231\250.sql"
@@ -0,0 +1,55 @@
+--（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"。
+create trigger tri_AddPeople
+on People  for insert
+as
+declare @DepartmentId int
+select @DepartmentId = DepartmentId from People
+if not exists(select * from Department where DepartmentId = @DepartmentId)
+	insert into Department values(@DepartmentId,'新部门')
+
+insert into People values('007','呼呼','男',15000)
+go
+--（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。
+create trigger tri_Delete
+on Department for delete 
+as
+delete People where DepartmentId = (select DepartmentId from deleted)
+go
+delete Department where DepartmentId = 1
+go
+
+--（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
+create trigger tri_UpdateDepartment
+on Department for update
+as
+declare @Old_DepartmentId int ,@New_DepartmentId int
+select @Old_DepartmentId = (select DepartmentId from deleted)
+select @New_DepartmentId = (select DepartmentId from inserted)
+update People set DepartmentId = @New_DepartmentId where DepartmentId = @Old_DepartmentId
+
+update Department set DepartmentId = '003' where DepartmentId = '001'
+
+--总经办-1000  市场部员工工资-2000
+--用存储过程和游标
+declare cur_PayCut cursor scroll
+for select DepartmentId from Department
+
+go
+create proc proc_PayCut
+as
+begin
+	open cur_PayCut
+	declare @DepartmentId int,@money money = 1000
+	fetch first from cur_PayCut into @DepartmentId
+	while(@@FETCH_STATUS = 0)
+	begin
+		update People set PeopleSalary -= @money where DepartmentId = @DepartmentId
+		set @money += 1000
+		fetch next from cur_PayCut into @DepartmentId
+	end
+	close cur_PayCut
+end
+
+exec proc_PayCut
+
diff --git "a/25\346\210\264\344\277\212\351\224\213/\347\254\224\350\256\260/2022.10.10\347\254\224\350\256\260--\350\247\246\345\217\221\345\231\250.md" "b/25\346\210\264\344\277\212\351\224\213/\347\254\224\350\256\260/2022.10.10\347\254\224\350\256\260--\350\247\246\345\217\221\345\231\250.md"
new file mode 100644
index 0000000..6054f06
--- /dev/null
+++ "b/25\346\210\264\344\277\212\351\224\213/\347\254\224\350\256\260/2022.10.10\347\254\224\350\256\260--\350\247\246\345\217\221\345\231\250.md"
@@ -0,0 +1,54 @@
+## 瑙﹀彂鍣紙trigger锛�
+
+#### 浠�涔堟槸瑙﹀彂鍣細 insert  --銆� 涓�绯诲垪闅忕潃鎻掑叆鎿嶄綔鑷姩鎵ц鐨剆ql璇彞闆嗗悎
+
+ **瑙﹀彂鍣�**锛� trigger 锛夋槸浣滀负**瀵规暟鎹簱淇敼鐨勮繛甯︽晥鏋�**鑰�**鐢辩郴缁熻嚜鍔ㄦ墽琛�**鐨勪竴鏉¤鍙ャ�傚畠鏄竴绉嶇壒娈婄殑**瀛樺偍杩囩▼**銆備篃鏄竴涓�**浜嬪姟**锛堝彲浠ュ洖婊氾級銆備负浜嗗畾涔変竴涓猍瑙﹀彂鍣╙(https://so.csdn.net/so/search?q=瑙﹀彂鍣�&spm=1001.2101.3001.7020)锛屾垜浠繀椤伙細
+
+- 鎸囨槑**浠�涔堟椂鍊欐墽琛岃Е鍙戝櫒**銆傝繖琚媶鍒嗕负**寮曡捣瑙﹀彂鍣ㄨ妫�娴嬬殑涓�涓猏*浜嬩欢\***鍜�**瑙﹀彂鍣ㄧ户缁墽琛屾墍蹇呴』婊¤冻鐨勪竴涓潯浠�**銆�
+- 鎸囨槑**褰撹Е鍙戝櫒鎵ц鏃舵墍閲囧彇鐨勫姩浣�**銆�
+
+
+
+#### 瑙﹀彂鍣ㄥ垎绫�
+
+鍒嗕负 DML瑙﹀彂鍣�
+
+#### DML瑙﹀彂鍣�  锛� 澧炲垹鏀�
+
+##### after瑙﹀彂鍣細  澧炲垹鏀� 涔嬪悗鎵ц鐨� 
+
+after瑙﹀彂鍣ㄤ富瑕佺敤浜庯細insert锛寀pdate锛宒elete
+
+##### instead of 瑙﹀彂鍣�     锛� 澧炲垹鏀� 涔嬪墠妫�鏌ョ殑
+
+
+
+#### 鍒涘缓瑙﹀彂鍣ㄧ殑璇彞
+
+```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
+```
+
+## 鎬荤粨
+
+ 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 
+
-- 
Gitee