From 2b14a812cc17ba02f5264183b52b33f1c00b8dd5 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E9=99=88=E9=B9=8F?= <3460863727@qq.com>
Date: Tue, 11 Oct 2022 23:26:34 +0800
Subject: [PATCH] =?UTF-8?q?=E7=AC=AC=E5=8D=81=E4=B8=80=E6=AC=A1?=
MIME-Version: 1.0
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---
 .../\350\247\246\345\217\221\345\231\250.sql" | 71 +++++++++++++++++++
 ...21\345\231\250\347\254\224\350\256\260.md" | 41 +++++++++++
 2 files changed, 112 insertions(+)
 create mode 100644 "18\351\231\210\351\271\217/\344\275\234\344\270\232/\350\247\246\345\217\221\345\231\250.sql"
 create mode 100644 "18\351\231\210\351\271\217/\347\254\224\350\256\260/10-10\350\247\246\345\217\221\345\231\250\347\254\224\350\256\260.md"

diff --git "a/18\351\231\210\351\271\217/\344\275\234\344\270\232/\350\247\246\345\217\221\345\231\250.sql" "b/18\351\231\210\351\271\217/\344\275\234\344\270\232/\350\247\246\345\217\221\345\231\250.sql"
new file mode 100644
index 0000000..0d47851
--- /dev/null
+++ "b/18\351\231\210\351\271\217/\344\275\234\344\270\232/\350\247\246\345\217\221\345\231\250.sql"
@@ -0,0 +1,71 @@
+--部门
+create table Department
+(
+	DepartmentId varchar(10) primary key , --主键，自动增长
+	DepartmentName nvarchar(50), --部门名称
+)
+--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
+)
+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')
+
+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)
+
+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 xinbu
+on people for insert
+as
+if not exists (select * from Department where DepartmentId=(select DepartmentId from inserted))
+insert Department values((select DepartmentId from inserted),'新部门')
+go
+insert People values ('006','赵云','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 sanc
+on people for delete
+as
+delete from people where DepartmentId =(select DepartmentId from deleted)
+go
+
+delete from people where DepartmentId='006'
+
+
+
+--（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 jjj
+on Department for update
+as
+update People set DepartmentId=(select DepartmentId from inserted)
+	where DepartmentId=(select DepartmentId from deleted)
+
+
+
+update Department set DepartmentId='007' where DepartmentId='001'
+
+
+drop trigger 
\ No newline at end of file
diff --git "a/18\351\231\210\351\271\217/\347\254\224\350\256\260/10-10\350\247\246\345\217\221\345\231\250\347\254\224\350\256\260.md" "b/18\351\231\210\351\271\217/\347\254\224\350\256\260/10-10\350\247\246\345\217\221\345\231\250\347\254\224\350\256\260.md"
new file mode 100644
index 0000000..84bff7b
--- /dev/null
+++ "b/18\351\231\210\351\271\217/\347\254\224\350\256\260/10-10\350\247\246\345\217\221\345\231\250\347\254\224\350\256\260.md"
@@ -0,0 +1,41 @@
+### 浠�涔堟槸瑙﹀彂鍣�
+
+瑙﹀彂鍣ㄥ氨鏄埆浜哄湪璺笂缁欎綘涓�宸存帉浣犱細鎵撳洖鍘�
+
+
+
+### 瑙﹀彂鍣ㄥ垎涓�
+
+##### DML瑙﹀彂鍣�  锛� 澧炲垹鏀�
+
+##### after瑙﹀彂鍣細  澧炲垹鏀� 涔嬪悗鎵ц鐨� 
+
+### 鍒涘缓瑙﹀彂鍣ㄧ殑璇彞
+
+```
+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