diff --git "a/27\345\217\267\350\265\265\346\265\251\346\225\217/\347\254\254\345\205\253\346\254\241\344\275\234\344\270\232/9-28\344\275\234\344\270\232.sql" "b/27\345\217\267\350\265\265\346\265\251\346\225\217/\347\254\254\345\205\253\346\254\241\344\275\234\344\270\232/9-28\344\275\234\344\270\232.sql"
new file mode 100644
index 0000000000000000000000000000000000000000..bcb2533cf396e6065083406953cc11aa1537526c
--- /dev/null
+++ "b/27\345\217\267\350\265\265\346\265\251\346\225\217/\347\254\254\345\205\253\346\254\241\344\275\234\344\270\232/9-28\344\275\234\344\270\232.sql"
@@ -0,0 +1,80 @@
+
+select * from AccountInfo --个人信息
+select * from BankCard  --银行卡信息
+select * from CardStateChange  --银行卡状态更改表
+select * from CardTransfer  --转账表
+select * from CardExchange  --交易记录
+
+--1.--假设刘备取款6000，(添加check约束，设置账户余额必须>=0)，要求：使用事务实现，修改余额和添加取款记录两步操作使用事务
+
+--事务
+--开始事务 begin transaction , begin tran
+begin transaction A
+
+declare @goods varchar(10) = '刘备'
+declare @AccountCode varchar(20) = (select AccountCode from AccountInfo where RealName='刘备')
+--取款
+update BankCard set CardMoney -= (6000) where AccountId = 1
+insert into CardExchange values(@AccountCode,0,6000,getdate())
+
+--添加check约束 设置账户余额必须>=0
+alter table BankCard add constraint CK_Money check(CardState >= 0)
+
+
+
+ 
+--2.--刘备向张飞转账1000元，(添加check约束，设置账户余额必须>=0)
+--事务
+--开始事务 begin transaction , begin tran
+begin transaction B 
+
+declare @CardNoOut varchar(20)=(
+select  B.CardNo from AccountInfo  A
+join BankCard B on B.AccountId=A.AccountId 
+where A.RealName='刘备' 
+)
+
+declare @CardNoIn varchar(20)=(
+select  B.CardNo from AccountInfo  A
+join BankCard B on B.AccountId=A.AccountId 
+where A.RealName='张飞' 
+)
+insert into CardTransfer values(@CardNoOut,@CardNoIn,1000,getdate())
+--添加check约束，设置账户余额必须>=0
+alter table BankCard add constraint CK_Money check(CardState >= 0) 
+
+--2.--刘备向张飞转账1000元
+update BankCard set CardMoney-=(1000) where BankCard.AccountId = (
+
+select  B.AccountId from AccountInfo  A
+join BankCard B on B.AccountId=A.AccountId 
+where A.RealName='刘备' 
+)
+
+update BankCard set CardMoney+=(1000) where BankCard.AccountId = (
+
+select  B.AccountId from AccountInfo  A
+join BankCard B on B.AccountId=A.AccountId 
+where A.RealName='张飞' 
+)
+
+
+
+
+
+
+select * from CardTransfer   --交易记录
+
+
+
+/*
+
+--转账信息表（存储转账信息记录）
+create table CardTransfer
+(
+	TransferId int primary key identity(1,1),--转账自动编号
+	CardNoOut varchar(30) not null, --转出银行卡号(与银行卡表形成主外键关系)
+	CardNoIn varchar(30) not null, --转入银行卡号(与银行卡表形成主外键关系)
+	TransferMoney money not null,--交易金额
+	TransferTime smalldatetime not null, --交易时间
+)*/
\ No newline at end of file
diff --git "a/27\345\217\267\350\265\265\346\265\251\346\225\217/\347\254\254\345\205\253\346\254\241\344\275\234\344\270\232/9-28\347\254\224\350\256\260.md" "b/27\345\217\267\350\265\265\346\265\251\346\225\217/\347\254\254\345\205\253\346\254\241\344\275\234\344\270\232/9-28\347\254\224\350\256\260.md"
new file mode 100644
index 0000000000000000000000000000000000000000..c791c1ab55b3176589591d2d527ab8f26bfd7b7b
--- /dev/null
+++ "b/27\345\217\267\350\265\265\346\265\251\346\225\217/\347\254\254\345\205\253\346\254\241\344\275\234\344\270\232/9-28\347\254\224\350\256\260.md"
@@ -0,0 +1,71 @@
+#      **涓�涓簨鍔″氨鏄竴涓畬鏁寸殑涓氬姟閫昏緫銆�
+
+#     鏄竴涓渶灏忕殑宸ヤ綔鍗曞厓锛屼笉鍙啀鍒嗐��**
+
+------
+
+**浠�涔堟槸涓�涓畬鏁寸殑涓氬姟閫昏緫锛�**
+
+渚嬶細
+ 鍋囪杞处,浠嶢璐︽埛鍚態璐︽埛涓浆璐�10000銆�
+ 灏咥璐︽埛鐨勯挶鍑忓幓10000锛坲pdate璇彞锛�
+ 灏咮璐︽埛鐨勯挶鍔犱笂10000锛坲pdate璇彞锛�
+ 杩欏氨鏄竴涓畬鏁寸殑涓氬姟閫昏緫銆�
+
+浠ヤ笂鎿嶄綔鏄竴涓渶灏忕殑宸ヤ綔鍗曞厓锛岃涔堝悓鏃舵垚鍔燂紝瑕佷箞鍚屾椂澶辫触锛屼笉鍙啀鍒嗐��
+ 杩欎袱涓猽pdate璇彞瑕佹眰蹇呴』鍚屾椂鎴愬姛鎴栬�呭悓鏃跺け璐ワ紝杩欐牱鎵嶈兘淇濊瘉閽辨槸姝ｇ‘鐨勩��
+
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+ insert
+ delete
+ update
+ 鍙湁浠ヤ笂涓変釜璇彞鏄鏁版嵁搴撹〃涓暟鎹繘琛屽銆佸垹銆佹敼鐨勩��
+
+鍙浣犵殑鎿嶄綔涓�鏃︽秹鍙婂埌鏁版嵁鐨勫銆佸垹銆佹敼锛岄偅涔堝氨涓�瀹氳鑰冭檻瀹夊叏闂銆�
+
+------
+
+**姝ｆ槸鍥犱负鍋氭煇浠朵簨鐨勬椂鍊欙紝闇�瑕佸鏉ML璇彞鍏卞悓鑱斿悎璧锋潵鎵嶈兘瀹屾垚锛屾墍浠ラ渶瑕佷簨鍔＄殑瀛樺湪銆傚鏋滀换浣曚竴浠跺鏉傜殑浜嬪効閮借兘涓�鏉ML璇彞鎼炲畾锛岄偅涔堜簨鍔″垯娌℃湁瀛樺湪鐨勪环鍊间簡銆�**
+
+涓�涓簨鍔″叾瀹炲氨鏄鏉ML璇彞鍚屾椂鎴愬姛锛屾垨鑰呭悓鏃跺け璐�!
+
+浜嬪姟锛氬氨鏄壒閲忕殑DML璇彞鍚屾椂鎴愬姛锛屾垨鑰呭悓鏃跺け璐�!
+
+------
+
+**浜嬪姟鏄�庝箞鍋氬埌澶氭潯DML璇彞鍚屾椂鎴愬姛鍜屽悓鏃跺け璐ョ殑鍛�?**
+
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+ 浜嬪姟寮�鍚簡:
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+ insert
+ insert
+ delete
+ update
+ update
+ update
+ 浜嬪姟缁撴潫浜嗐��
+
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+ 鍦ㄤ簨鍔＄殑鎵ц杩囩▼涓紝鎴戜滑鍙互鎻愪氦浜嬪姟锛屼篃鍙互鍥炴粴浜嬪姟銆�
+
+- 鎻愪氦浜嬪姟锛�
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+    鎻愪氦浜嬪姟鏍囧織鐫�锛屼簨鍔＄殑缁撴潫銆傚苟涓旀槸涓�绉嶅叏閮ㄦ垚鍔熺殑缁撴潫銆�
+- 鍥炴粴浜嬪姟锛�
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+
+**鎻愪氦浜嬪姟锛屽洖婊氫簨鍔�**
+
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+ 浜嬪姟瀵瑰簲鐨勮嫳璇崟璇嶆槸: transaction
+
+mysql涓粯璁よ嚜鍔ㄦ彁浜や簨鍔★紝姣忔墽琛屼竴鏉ML璇彞锛屾彁浜や竴娆★紙浼氬鑷磖ollback娌℃湁鏁堟灉锛�
+
+鍏抽棴mysql鑷姩鎻愪氦鏈哄埗
+ 鎵ц鍛戒护锛歴tart transaction;
+
+
+