From d499230b181c108df54ca35643f8e84139c8fb9f Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E6=9E=97=E4=B8=96=E6=B6=9B?= <2124876211@qq.com>
Date: Tue, 11 Oct 2022 20:14:18 +0800
Subject: [PATCH] =?UTF-8?q?=E6=9E=97=E4=B8=96=E6=B6=9B?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 .../2022.10.10\344\275\234\344\270\232.sql"   | 24 +++++++++++++++++++
 .../2022.10.10\347\254\224\350\256\260.md"    | 10 ++++++++
 2 files changed, 34 insertions(+)
 create mode 100644 "23\346\236\227\344\270\226\346\266\233/\344\275\234\344\270\232/2022.10.10\344\275\234\344\270\232.sql"
 create mode 100644 "23\346\236\227\344\270\226\346\266\233/\347\254\224\350\256\260/2022.10.10\347\254\224\350\256\260.md"

diff --git "a/23\346\236\227\344\270\226\346\266\233/\344\275\234\344\270\232/2022.10.10\344\275\234\344\270\232.sql" "b/23\346\236\227\344\270\226\346\266\233/\344\275\234\344\270\232/2022.10.10\344\275\234\344\270\232.sql"
new file mode 100644
index 0000000..b04fa89
--- /dev/null
+++ "b/23\346\236\227\344\270\226\346\266\233/\344\275\234\344\270\232/2022.10.10\344\275\234\344\270\232.sql"
@@ -0,0 +1,24 @@
+--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 huhu
+on people for insert
+as
+	insert into Department values ((select DepartmentId from inserted),'新部门')
+go
+
+insert into People(DepartmentId,PeopleName,PeopleSex,PeopleSalary) values ('123','咕咕','男',200)
+--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 huahua
+on department for delete
+as
+	delete from people where DepartmentId=(select DepartmentId from deleted)
+go
+	
+delete from Department where DepartmentId='123'
+--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 gugu
+on department for update
+as
+	update People set DepartmentId=(select DepartmentId from inserted) where DepartmentId=(select DepartmentId from deleted)
+go
+
+update Department set DepartmentId='004' where DepartmentId='123'
\ No newline at end of file
diff --git "a/23\346\236\227\344\270\226\346\266\233/\347\254\224\350\256\260/2022.10.10\347\254\224\350\256\260.md" "b/23\346\236\227\344\270\226\346\266\233/\347\254\224\350\256\260/2022.10.10\347\254\224\350\256\260.md"
new file mode 100644
index 0000000..ea7fe13
--- /dev/null
+++ "b/23\346\236\227\344\270\226\346\266\233/\347\254\224\350\256\260/2022.10.10\347\254\224\350\256\260.md"
@@ -0,0 +1,10 @@
+create tirgger  名
+on  表  for isnert/delete/update
+as
+*********
+
+
+
+
+inserted（新数据）
+deleted（旧数据） 
\ No newline at end of file
-- 
Gitee