From 967cb823e7a43226976d904d56a5af7f6842be05 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E6=9D=8E=E6=B6=9B?= <1986456126@qq.com>
Date: Tue, 11 Oct 2022 04:29:55 +0000
Subject: [PATCH 1/2] =?UTF-8?q?=E6=96=B0=E5=BB=BA=202022-10-10=EF=BC=88?=
 =?UTF-8?q?=E7=AC=AC=E5=8D=81=E4=BA=8C=E6=AC=A1=E4=BD=9C=E4=B8=9A=EF=BC=89?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 .../.keep"                                                        | 0
 1 file changed, 0 insertions(+), 0 deletions(-)
 create mode 100644 "09\346\235\216\346\266\233/2022-10-10\357\274\210\347\254\254\345\215\201\344\272\214\346\254\241\344\275\234\344\270\232\357\274\211/.keep"

diff --git "a/09\346\235\216\346\266\233/2022-10-10\357\274\210\347\254\254\345\215\201\344\272\214\346\254\241\344\275\234\344\270\232\357\274\211/.keep" "b/09\346\235\216\346\266\233/2022-10-10\357\274\210\347\254\254\345\215\201\344\272\214\346\254\241\344\275\234\344\270\232\357\274\211/.keep"
new file mode 100644
index 0000000..e69de29
-- 
Gitee


From 0ce8e8048c24abc0d8583731cc78588fe9682924 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E6=9D=8E=E6=B6=9B?= <1986456126@qq.com>
Date: Tue, 11 Oct 2022 04:30:40 +0000
Subject: [PATCH 2/2] =?UTF-8?q?=E6=9D=8E=E6=B6=9B?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

Signed-off-by: 鏉庢稕 <1986456126@qq.com>
---
 .../\344\275\234\344\270\232.sql"             | 38 +++++++++++++++++
 .../\347\254\224\350\256\260.txt"             | 41 +++++++++++++++++++
 2 files changed, 79 insertions(+)
 create mode 100644 "09\346\235\216\346\266\233/2022-10-10\357\274\210\347\254\254\345\215\201\344\272\214\346\254\241\344\275\234\344\270\232\357\274\211/\344\275\234\344\270\232.sql"
 create mode 100644 "09\346\235\216\346\266\233/2022-10-10\357\274\210\347\254\254\345\215\201\344\272\214\346\254\241\344\275\234\344\270\232\357\274\211/\347\254\224\350\256\260.txt"

diff --git "a/09\346\235\216\346\266\233/2022-10-10\357\274\210\347\254\254\345\215\201\344\272\214\346\254\241\344\275\234\344\270\232\357\274\211/\344\275\234\344\270\232.sql" "b/09\346\235\216\346\266\233/2022-10-10\357\274\210\347\254\254\345\215\201\344\272\214\346\254\241\344\275\234\344\270\232\357\274\211/\344\275\234\344\270\232.sql"
new file mode 100644
index 0000000..2451c65
--- /dev/null
+++ "b/09\346\235\216\346\266\233/2022-10-10\357\274\210\347\254\254\345\215\201\344\272\214\346\254\241\344\275\234\344\270\232\357\274\211/\344\275\234\344\270\232.sql"
@@ -0,0 +1,38 @@
+select * from people
+select * from Department
+--（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_GetNewDepartment
+on people for insert
+as
+declare @id varchar(20)
+set @id = (select DepartmentId from inserted)
+if not exists(select * from Department where @id=DepartmentId)
+
+begin
+insert into Department(DepartmentId,DepartmentName) values(@id,'新部门')
+end
+insert into people values('007','孙策','男',6500)
+
+drop trigger tri_GetNewDepartment;
+--（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
+	--删员工
+	delete from People where DepartmentId = (select DepartmentId from deleted)    --updated
+
+delete from Department where DepartmentId = '005';
+
+drop trigger tri_delete;
+--（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_GetUpdate
+on Department for update
+as
+declare @newid varchar(20) = (select DepartmentId from inserted)
+declare @oldid varchar(20) = (select DepartmentId from deleted)
+
+update people set DepartmentId = @newid where @oldid=DepartmentId
+;
+update Department set DepartmentId = '005' where DepartmentId='007';
+drop trigger tri_GetUpdate;
\ No newline at end of file
diff --git "a/09\346\235\216\346\266\233/2022-10-10\357\274\210\347\254\254\345\215\201\344\272\214\346\254\241\344\275\234\344\270\232\357\274\211/\347\254\224\350\256\260.txt" "b/09\346\235\216\346\266\233/2022-10-10\357\274\210\347\254\254\345\215\201\344\272\214\346\254\241\344\275\234\344\270\232\357\274\211/\347\254\224\350\256\260.txt"
new file mode 100644
index 0000000..6a4ddf8
--- /dev/null
+++ "b/09\346\235\216\346\266\233/2022-10-10\357\274\210\347\254\254\345\215\201\344\272\214\346\254\241\344\275\234\344\270\232\357\274\211/\347\254\224\350\256\260.txt"
@@ -0,0 +1,41 @@
+## 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
\ No newline at end of file
-- 
Gitee