diff --git "a/04\351\203\221\347\216\256\345\226\206/\344\275\234\344\270\232/2022.09.28-\347\254\254\345\205\253\346\254\241\344\275\234\344\270\232.txt" "b/04\351\203\221\347\216\256\345\226\206/\344\275\234\344\270\232/2022.09.28-\347\254\254\345\205\253\346\254\241\344\275\234\344\270\232.txt"
new file mode 100644
index 0000000000000000000000000000000000000000..6b0b31a958b4780e010a0f83ad0e2f4700143d4f
--- /dev/null
+++ "b/04\351\203\221\347\216\256\345\226\206/\344\275\234\344\270\232/2022.09.28-\347\254\254\345\205\253\346\254\241\344\275\234\344\270\232.txt"
@@ -0,0 +1,62 @@
+--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
+alter table BankCard add constraint CK_Money check(CardMoney >= 0)
+
+declare @myError int = 0
+declare @getMoney float = 6000
+declare @carID varchar(10)
+declare @name  varchar(10)
+declare @Phone varchar(10)
+set @name = '刘备'
+
+select @carID = (select b.CardNo from AccountInfo a inner join BankCard b on a.AccountId =b.AccountId where RealName = @name)
+select @Phone = (select a.AccountPhone from AccountInfo a inner join BankCard b on a.AccountId =b.AccountId where RealName = @name)
+
+begin transaction A
+update BankCard set CardMoney -= @getMoney where CardNo = @carID
+set @myError += @@ERROR
+insert into CardExchange values(@carID,0,@getMoney,getdate())
+set @myError += @@ERROR
+
+if(@myError = 0)
+begin
+	commit transaction A
+end
+else 
+begin
+	rollback transaction B
+end
+go
+
+--2.--刘备向张飞转账1000元，(添加check约束，设置账户余额必须>=0)
+alter table BankCard add constraint CK_Money check(CardMoney >= 0)
+declare @myError int = 0
+declare @getMoney float = 1000
+declare @carID varchar(10)
+declare @carID1 varchar(10)
+declare @name  varchar(10)
+declare @name1  varchar(10)
+declare @Phone varchar(10)
+declare @Phone1 varchar(10)
+set @name = '刘备'
+set @name1 = '张飞'
+select @carID = (select b.CardNo from AccountInfo a inner join BankCard b on a.AccountId =b.AccountId where RealName = @name)
+select @Phone = (select a.AccountPhone from AccountInfo a inner join BankCard b on a.AccountId =b.AccountId where RealName = @name)
+select @carID1 = (select b.CardNo from AccountInfo a inner join BankCard b on a.AccountId =b.AccountId where RealName = @name1)
+select @Phone1 = (select a.AccountPhone from AccountInfo a inner join BankCard b on a.AccountId =b.AccountId where RealName = @name1)
+
+begin transaction
+update BankCard set CardMoney -= @getMoney where CardNo = @carID
+set @myError += @@ERROR
+update BankCard set CardMoney += @getMoney where CardNo = @carID1
+set @myError += @@ERROR
+insert into CardTransfer values(@carID,@carID1,@getMoney,getdate())
+set @myError += @@ERROR
+
+if(@myError = 0)
+begin
+	commit transaction
+end
+else 
+begin
+	rollback transaction
+end
\ No newline at end of file
diff --git "a/04\351\203\221\347\216\256\345\226\206/\347\254\224\350\256\260/2022.09.28-\344\272\213\345\212\241.md" "b/04\351\203\221\347\216\256\345\226\206/\347\254\224\350\256\260/2022.09.28-\344\272\213\345\212\241.md"
new file mode 100644
index 0000000000000000000000000000000000000000..b9354ad5f26a07c924f37d340b784d77aa77d1fe
--- /dev/null
+++ "b/04\351\203\221\347\216\256\345\226\206/\347\254\224\350\256\260/2022.09.28-\344\272\213\345\212\241.md"
@@ -0,0 +1,23 @@
+8、事务
+
+### Transaction
+
+一般来说，事务具有四个标准属性，分别是原子性（**A**tomicity，或称不可分割性）、一致性（**C**onsistency）、隔离性（**I**solation，又称独立性）、持久性（**D**urability），简称 **ACID**。
+
+**自动提交事物**： 是SQL Server默认的一种事务模式，每条Sql语句都被看成一个事务进行处理。
+
+**显式事务**: T-sql标明，由Begin Transaction开启事务开始，由Commit Transaction 提交事务、Rollback Transaction 回滚事务结束。
+
+开始语句
+
+    begin transaction
+
+用@@errorr来判断是否回滚
+
+提交语句
+
+    commit transaction
+
+回滚语句
+
+    rollback transaction