diff --git "a/35\351\273\204\346\237\261\350\217\230/\351\273\204\346\237\261\350\217\23035/2022-9-28.sql" "b/35\351\273\204\346\237\261\350\217\230/\351\273\204\346\237\261\350\217\23035/2022-9-28.sql"
new file mode 100644
index 0000000000000000000000000000000000000000..cea0107133219c2b459474b07c0d5c91fda3992e
--- /dev/null
+++ "b/35\351\273\204\346\237\261\350\217\230/\351\273\204\346\237\261\350\217\23035/2022-9-28.sql"
@@ -0,0 +1,48 @@
+-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
+	use BankTest
+	alter table bankcard add constraint money check(cardmoney>=0)
+	update BankCard set CardMoney=7000 where AccountId=1
+	begin transaction
+	declare @myerr int = 0
+	declare @money decimal(13,2)=6000,
+	@id int=(
+	select AccountId from AccountInfo where RealName='刘备')
+	declare
+	@price decimal(13,2)=(select CardMoney from BankCard where
+	AccountId=@id)
+	declare @cardno varchar(50)=(select cardno from BankCard where AccountId=@id);
+	update BankCard set CardMoney-=@money where AccountId=@id;
+	set @myerr+=@@ERROR
+	insert into CardExchange values(@cardno,@money,0,getdate());
+	set @myerr+=@@ERROR
+	if (@myerr = 0)
+	begin
+		commit transaction
+	end
+	else
+	begin
+		rollback transaction
+	end
+--刘备向张飞转账1000元，(添加check约束，设置账户余额必须>=0)
+	begin transaction
+		declare @false int=0
+		declare @money1 decimal(13,2)=1000,
+				@outid varchar(50)=(select AccountId from AccountInfo where RealName='刘备'),
+				@inid varchar(50)=(select AccountId from AccountInfo where RealName='张飞')
+		declare
+				@outcard varchar(50)=(select cardno from BankCard where AccountId=@outid ),
+				@incard varchar(50)=(select cardno from BankCard where AccountId=@inid )
+		update BankCard set CardMoney+=@money1 where AccountId=@inid
+		set @false+=@@ERROR
+		update BankCard set CardMoney-=@money1 where AccountId=@outid
+		set @false+=@@ERROR
+		insert into CardTransfer values(@outcard,@incard,@money1,GETDATE())
+		set @false+=@@ERROR
+	if(@false=0)
+		begin
+		commit transaction
+		end
+		else
+		begin
+		rollback transaction
+	end
\ No newline at end of file
diff --git "a/35\351\273\204\346\237\261\350\217\230/\351\273\204\346\237\261\350\217\23035/2022-9-28\347\254\224\350\256\260 \344\272\213\345\212\241.md.url" "b/35\351\273\204\346\237\261\350\217\230/\351\273\204\346\237\261\350\217\23035/2022-9-28\347\254\224\350\256\260 \344\272\213\345\212\241.md.url"
new file mode 100644
index 0000000000000000000000000000000000000000..9f4054e771c42132f620f3ca7bebc05c60e5e0f4
--- /dev/null
+++ "b/35\351\273\204\346\237\261\350\217\230/\351\273\204\346\237\261\350\217\23035/2022-9-28\347\254\224\350\256\260 \344\272\213\345\212\241.md.url"	
@@ -0,0 +1,2 @@
+[InternetShortcut]
+URL=https://gitee.com/level-21-software-class-4/advanced-sql/blob/master/07%20%E5%BB%96%E6%B2%BB%E5%85%88/%E7%AC%94%E8%AE%B0/2022-9-28%E7%AC%94%E8%AE%B0%20%E4%BA%8B%E5%8A%A1.md