diff --git "a/21\345\272\204\344\272\221/\344\275\234\344\270\232/2022-9-22.sql" "b/21\345\272\204\344\272\221/\344\275\234\344\270\232/2022-9-22.sql"
new file mode 100644
index 0000000000000000000000000000000000000000..943b2c274e4828a11fc0e5a92f12ce858bed8f5b
--- /dev/null
+++ "b/21\345\272\204\344\272\221/\344\275\234\344\270\232/2022-9-22.sql"
@@ -0,0 +1,97 @@
+--#### 变量
+select * from AccountInfo;
+select *from BankCard;
+select * from CardExchange;
+select * from CardStateChange;
+select * from CardTransfer;
+--1. 为赵云此人进行开户开卡操作，赵云身份证：420107199904054233
+declare @idcard varchar(20),@a varchar(20),@aid int,@cn varchar(30)
+set @idcard = '420107199904054233'
+select @a=AccountCode from AccountInfo where AccountCode=@idcard
+
+if(@a is null)
+ begin
+ insert into AccountInfo(AccountCode,AccountPhone,RealName,OpenTime) values (@idcard,'           ','赵云',GETDATE())
+ select @aid =AccountId  from AccountInfo where AccountCode=@idcard
+ insert into BankCard  (CardNo,AccountId,CardPwd,CardMoney,CardState,CardTime) values ('6225547858741264',@aid,'123456',0,1,GETDATE ())
+ select @cn=CardNo from BankCard where AccountId=@aid
+print '您已成功开卡开户，你的卡号是' +@cn+'初始密码是123456'
+ end
+ else
+ begin
+ print '已有此用户'
+ end
+
+--2. 需要求出张飞的银行卡卡号和余额，张飞身份证：420107199602034138  （1.使用连接查询，2.使用变量）
+
+--#### 逻辑控制
+
+--##### 条件分支if-else
+   
+
+--?	3.某用户银行卡号为“6225547854125656”，该用户执行取钱操作，取钱5000元，余额充足则进行取钱操作，并提示"取钱成功"，否则提示“余额不足”。
+
+--##### 条件分支:case-when
+declare @cardmoney money;
+select @cardmoney= CardMoney from BankCard where CardNo='6225547854125656';
+if @cardmoney>5000 
+begin
+update BankCard set CardMoney=CardMoney-5000 where CardNo='6225547854125656' 
+insert into CardExchange (CardNo,MoneyInBank,MoneyOutBank,ExchangeTime) values ('6225547854125656',0,5000,GETDATE())
+print '取钱成功'
+end
+else
+begin
+print '余额不足'
+end
+
+--?	4.查询银行卡信息，将银行卡状态1,2,3,4分别转换为汉字“正常,挂失,冻结,注销”，并且根据银行卡余额显示银行卡等级 30万以下为“普通用户”,30万及以上为"VIP用户"，  
+
+----显示列分别为卡号，身份证，姓名，余额，用户等级，银行卡状态。
+
+--##### **while**
+select CardNo,AccountCode,RealName,CardMoney ,
+(
+case 
+when CardState=1 then '正常'
+when CardState=2 then '挂失'
+when CardState=3 then '冻结'
+when CardState=4 then '注销'
+end 
+) 银行卡状态,
+(
+case 
+when CardMoney>30000 then 'VIP客户'
+when CardMoney<30000 then '普通用户'
+end 
+) 银行卡等级
+  from BankCard
+  inner join AccountInfo on AccountInfo.AccountId=BankCard.AccountId
+
+--?	5.循环打印1-10。
+declare @b int 
+set @b=1
+while (@b<=10)
+begin
+print @b
+set @b+=1
+end
+----?	6.打印99乘法表
+declare @n int = 1
+while @n<=9
+begin
+
+	declare @m int = 1
+	declare @result varchar(500) = ''
+	while @m<=@n
+
+	begin
+	set @result = @result + convert(varchar(2), @n) + ' * ' + 
+	convert(varchar(2), @m) + ' = '+ convert(varchar(2),@n*@m) + char(9)
+	set @m =@m + 1	
+	end
+
+	print @result
+	set @n = @n + 1
+
+end
\ No newline at end of file
diff --git "a/21\345\272\204\344\272\221/\347\254\224\350\256\260/SQL SERVER.md" "b/21\345\272\204\344\272\221/\347\254\224\350\256\260/SQL SERVER.md"
index 3d7f90e09c0974850288f06dd5cf36fe4222a4e1..8cd63f9aa8b401853454f20ab341f2048f50e3f2 100644
--- "a/21\345\272\204\344\272\221/\347\254\224\350\256\260/SQL SERVER.md"	
+++ "b/21\345\272\204\344\272\221/\347\254\224\350\256\260/SQL SERVER.md"	
@@ -204,3 +204,146 @@ Select CONVERT(varchar(20),GETDATE(),14)          --15:05:49:330
 ##### 鍒嗗尯鍑芥暟 partition by  
 
 partition by鐩告瘮杈冧簬group by锛岃兘澶熷湪淇濈暀鍏ㄩ儴鏁版嵁鐨勫熀纭�涓婏紝鍙鍏朵腑鏌愪簺瀛楁鍋氬垎缁勬帓搴忥紝鑰実roup by鍒欏彧淇濈暀鍙備笌鍒嗙粍鐨勫瓧娈靛拰鑱氬悎鍑芥暟鐨勭粨鏋溿��
+
+## 鍙橀噺涓庨�昏緫鎺у埗
+
+- 鎺屾彙鍙橀噺鐨勫畾涔夊拰浣跨敤
+- 鎺屾彙杈撳嚭璇彞
+- 鎺屾彙閫昏緫鎺у埗璇彞
+- 鐞嗚В鎵瑰鐞嗙殑姒傚康
+
+### 鍙橀噺
+
+#### 灞�閮ㄥ彉閲�
+
+灞�閮ㄥ彉閲忓繀椤讳互鏍囪@浣滀负鍓嶇紑 锛屽@age
+灞�閮ㄥ彉閲忕殑浣跨敤鏄厛澹版槑锛屽啀璧嬪��
+灞�閮ㄥ彉閲忓彧鍦ㄥ畾涔夊畠鐨勫眬閮ㄨ寖鍥村唴鏈夋晥
+
+
+
+澹版槑涓�涓眬閮ㄥ彉閲忥細**declare @鍙橀噺鍚� 鏁版嵁绫诲瀷**
+
+```sql
+--渚嬶細
+	declare @id int --澹版槑涓�涓悕涓篿d鐨勬暣鍨嬪彉閲�
+	declare @name varchar(50)  --澹版槑涓�涓彲鍙橀暱搴︿负50鐨勫瓨鏀惧鍚嶇殑瀛楃涓插彉閲�
+
+```
+
+璧嬪�硷細
+
+- set @鍙橀噺鍚� = 鍊�
+
+- select @鍙橀噺鍚� = 鍊�
+
+```sql
+--渚�:
+	select @id = 1001
+	set @name = '寮犱笁'
+```
+
+set涓巗elect璧嬪�肩殑鍖哄埆锛�
+
+set璧嬪�肩粰鍙橀噺鎸囧畾鐨勫�硷紝select涓�鑸敤浜庤〃涓煡璇㈠嚭鐨勬暟鎹祴鍊肩粰鍙橀噺锛屽鏋滄煡璇㈢粨鏋滄湁澶氭潯锛屽彇鏈�鍚庝竴鏉¤祴鍊肩粰鍙橀噺
+
+#### 鍏ㄥ眬鍙橀噺
+
+鍏ㄥ眬鍙橀噺蹇呴』浠ユ爣璁癅@浣滀负鍓嶇紑锛屽@@version
+鍏ㄥ眬鍙橀噺鐢�**绯荤粺瀹氫箟鍜岀淮鎶�**锛屾垜浠�**鍙兘璇诲彇锛屼笉鑳戒慨鏀瑰叏灞�鍙橀噺鐨勫��** 
+鍏ㄥ眬鍙橀噺鍦ㄦ暣涓猄QL鐜涓嬮兘鍙互琚闂垨璋冪敤
+
+```sql
+--@@ERROR锛氳繑鍥炴墽琛岀殑涓婁竴涓鍙ョ殑閿欒鍙�
+--@@IDENTITY锛氳繑鍥炴渶鍚庢彃鍏ョ殑鏍囪瘑鍊�
+--@@MAX_CONNECTIONS锛氳繑鍥炲厑璁稿悓鏃惰繘琛岀殑鏈�澶х敤鎴疯繛鎺ユ暟
+--@@ROWCOUNT锛氳繑鍥炲彈涓婁竴璇彞褰卞搷鐨勮鏁�
+--@@SERVERNAME锛氳繑鍥炶繍琛� SQL Server 鐨勬湰鍦版湇鍔″櫒鐨勫悕绉�
+--@@SERVICENAME锛氳繑鍥� SQL Server 姝ｅ湪鍏朵笅杩愯鐨勬敞鍐岃〃椤圭殑鍚嶇О
+--@@TRANCOUNT锛氳繑鍥炲綋鍓嶈繛鎺ョ殑娲诲姩浜嬪姟鏁�
+--@@LOCK_TIMEOUT锛氳繑鍥炲綋鍓嶄細璇濈殑褰撳墠閿佸畾瓒呮椂璁剧疆锛堟绉掞級
+```
+
+
+
+
+
+
+
+## 杈撳嚭璇彞
+
+1. print鍙橀噺鎴栬〃杈惧紡
+2. select鍙橀噺鎴栬〃杈惧紡
+
+```sql
+--渚�:
+	print '鏁版嵁搴撴湇鍔″櫒鍚�:' + @@servicename
+	select 15*8
+```
+
+
+
+#### 浣跨敤convert鍑芥暟
+
+鈥�	鐢变簬PRINT 鍛戒护鍚戝鎴风杩斿洖涓�涓粨鏋滅殑瀛楃涓茬殑淇℃伅銆傚鏋滃彉閲忓�间笉鏄瓧绗︿覆鐨勮瘽蹇呴』鍏堢敤鏁版嵁绫诲瀷杞崲鍑芥暟 CONVERT 灏嗗叾杞崲涓哄瓧绗︿覆銆�
+
+```sql
+--鏄剧ず鑷姩缂栧彿
+print 	'褰撳墠鑷姩缂栧彿鐨勫��:' + convert(varchar(10),@@IDENTITY)
+```
+
+**cast(瀛楁鍚� as 鏁版嵁绫诲瀷)**
+
+## 閫昏緫鎺у埗璇彞
+
+#### if鏉′欢鍒嗘敮
+
+![1662377697247](E:\涓撲笟璇綷SQL sever\02-鍙橀噺涓庨�昏緫鎺у埗\1662377697247.png)
+
+
+
+#### 寰幆鎺у埗璇彞
+
+![1662377859010](E:\涓撲笟璇綷SQL sever\02-鍙橀噺涓庨�昏緫鎺у埗\1662377859010.png)
+
+##### 	while锛氬彲浠ラ�氳繃break鍜宑ontinue鎺у埗寰幆璇彞涓殑鎵ц銆�
+
+#### 閫昏緫鎺у埗璇彞   switch case
+
+![1662377940867](E:\涓撲笟璇綷SQL sever\02-鍙橀噺涓庨�昏緫鎺у埗\1662377940867.png)
+
+
+
+## 鎵瑰鐞嗚鍙�
+
+go璇彞鐗圭偣:
+
+1. 绛夊緟go璇彞鍓嶇殑浠ｇ爜鎵ц瀹屾垚鍚庯紝鍐嶆墽琛実o鍚庨潰鐨勪唬鐮併��
+2. 鎵瑰鐞嗚鍙ョ殑缁撴潫鏍囧織銆�
+
+```sql
+--涓嬮潰鐨凘num鍙橀噺浣滅敤鍩熶负鍏ㄥ眬
+--declare @num int
+--set @num = 0
+
+--涓嬮潰鐨凘num鍙橀噺鐨勪綔鐢ㄥ煙鏄眬閮紝鍙湪涓や釜go涔嬮棿鍙互浣跨敤锛屾渶鍚庝竴琛屼唬鐮佷細鎶ラ敊
+--.........sql浠ｇ爜
+--go
+--declare @num int
+--set @num = 0
+--go
+--set @num = 1
+```
+
+
+
+
+
+## 鎬荤粨
+
+鍙橀噺鐨勪娇鐢ㄣ�傝鍏堢敤DECLARE 鍏抽敭瀛楀０鏄庯紝鐒跺悗鐢⊿ET鎴朣ELECT璧嬪�笺�傚眬閮ㄥ彉閲忓墠蹇呴』鏈� 鈥淍鈥� 浣滃墠缂�锛屽叏灞�鍙橀噺蹇呴』鏈� 鈥淍@鈥� 浣滃墠缂�銆�
+鍙橀噺鐨勮緭鍑哄彲浠ョ敤锛歅RINT鎴朣ELECT璇彞銆�
+閫昏緫鎺у埗璇彞鎻愪緵浜嗘潯浠舵搷浣滄墍闇�鐨勯『搴忓拰閫昏緫銆�
+浜嗚ВT-SQL缂栧啓宸ュ叿銆�
+鎵瑰鐞嗗彲浠ユ彁楂樿鍙ユ墽琛岀殑鏁堢巼锛屼娇鐢ㄢ�淕O鈥濅綔涓虹粨鏉熸爣蹇椼��
+