diff --git "a/17\345\220\264\346\226\207\351\276\231/\344\275\234\344\270\232/SQLQuery1.sql" "b/17\345\220\264\346\226\207\351\276\231/\344\275\234\344\270\232/SQLQuery1.sql"
new file mode 100644
index 0000000000000000000000000000000000000000..48f9f83df2cb1ddd28d5e4aab9828ca655bcd6de
--- /dev/null
+++ "b/17\345\220\264\346\226\207\351\276\231/\344\275\234\344\270\232/SQLQuery1.sql"
@@ -0,0 +1,33 @@
+--（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"。
+select * from Department
+select * from People
+create trigger tri_insert
+on people for insert
+as
+if not exists(select*from Department where DepartmentId=(select DepartmentId from inserted ) )
+ insert into Department(DepartmentId,DepartmentName) values((select DepartmentId from inserted),'新部门')
+
+ insert into People(DepartmentId,PeopleName,PeopleSex,Peoplesalary) values ('005','赵云','男','3000.00')
+ drop trigger tri_insert 
+
+
+
+
+--（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_out
+on Department for delete
+as
+	delete from People where DepartmentId=(select DepartmentId from inserted )
+delete from Department where DepartmentId='004'
+--**（3）创建一个触发器，删除一个部门的时候判断该部门下是否有员工，有则不删除，没有则删除。**
+create 
+--（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_updata
+on Department for update
+as
+	update Department set DepartmentId=(select DepartmentId from inserted)
+	where DepartmentId=(select DepartmentId from inserted)
+
+update Department set DepartmentId = '005'where DepartmentId ='001'
+	
\ No newline at end of file
diff --git "a/17\345\220\264\346\226\207\351\276\231/\347\254\224\350\256\260/SQL\350\247\246\345\217\221\345\231\250\347\232\204\344\275\277\347\224\250\345\217\212\350\257\255\346\263\225.md" "b/17\345\220\264\346\226\207\351\276\231/\347\254\224\350\256\260/SQL\350\247\246\345\217\221\345\231\250\347\232\204\344\275\277\347\224\250\345\217\212\350\257\255\346\263\225.md"
new file mode 100644
index 0000000000000000000000000000000000000000..d91296c60dfde1c546bde9966b03d4c60494f983
--- /dev/null
+++ "b/17\345\220\264\346\226\207\351\276\231/\347\254\224\350\256\260/SQL\350\247\246\345\217\221\345\231\250\347\232\204\344\275\277\347\224\250\345\217\212\350\257\255\346\263\225.md"
@@ -0,0 +1,48 @@
+### SQL瑙﹀彂鍣ㄧ殑浣跨敤鍙婅娉�
+
+##### 瀹氫箟锛� 浣曚负瑙﹀彂鍣紵鍦⊿QL Server閲岄潰涔熷氨鏄鏌愪竴涓〃鐨勪竴瀹氱殑鎿嶄綔锛岃Е鍙戞煇绉嶆潯浠讹紝浠庤�屾墽琛岀殑涓�娈电▼搴忋�傝Е鍙戝櫒鏄竴涓壒娈婄殑瀛樺偍杩囩▼銆�
+
+甯歌鐨勮Е鍙戝櫒鏈変笁绉岲ML瑙﹀彂鍣�  锛� 澧炲垹鏀�
+
+after瑙﹀彂鍣紙 澧炲垹鏀� 涔嬪悗鎵ц鐨� 锛�
+
+after瑙﹀彂鍣ㄤ富瑕佺敤浜庯紙insert锛寀pdate锛宒elete锛�
+
+instead of 瑙﹀彂鍣�  锛堝鍒犳敼 涔嬪墠妫�鏌ョ殑锛�
+
+##### 
+
+ **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
+
+##### 鎿嶄綔锛�
+
+```sql
+CREATE TRIGGER <瑙﹀彂鍣ㄥ悕绉�>
+ 
+ON table_name
+FOR [DELETE, INSERT, UPDATE]
+ 
+AS
+ 
+  T-SQL璇彞 (inserted,deleted,update娌℃湁upadated)
+ 
+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ㄧず鎻掑叆鍚庣殑鏁版嵁 
+
+2.鍒犻櫎鎿嶄綔锛圖elete锛� 
+deleted 琛ㄧず鍒犻櫎鍚庣殑鏁版嵁
+
+3.鏇存柊鎿嶄綔锛圲pdate锛� 
+
+update 娌℃湁updated 鎵�浠ョ敤inserted琛ㄧず鏂版暟鎹紝deleted琛ㄧず鏃ф暟鎹�
+
+***\*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 
+