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@@ -0,0 +1,51 @@
+```sql
+
+create table bank(
+ id int primary key auto_increment ,
+ username varchar(10),
+ money int
+);
+
+INSERT INTO `bank` VALUES (1, '张三', 100);
+INSERT INTO `bank` VALUES (2, '李四', 200);
+
+
+
+## 练习题：
+
+-- 1, 手动关闭系统全局的全动提交。查询表内容，新增一个自己的帐号，和金额，最后回滚。再查询表内容；
+set autocommit = 0;
+select * from bank;
+INSERT INTO `bank` VALUES (3, '墩子', 300);
+rollback;
+select * from bank;
+-- 2，用 START TRANSACTION 开启事务，查询表内容，把李四的金额改成5000，回滚事务，再查询表内容；
+start transaction;
+update bank set money = 5000 where id= 2;
+select * from bank;
+rollback;
+select * from bank;
+-- 3，用 START TRANSACTION 开启事务，查询表内容，把李四的金额改成5000，提交事务，再查询表内容；
+start transaction;
+select * from bank;
+update bank set money=5000 where id =2;
+select * from bank;
+commit;
+select * from bank;
+
+-- 4，用 START TRANSACTION 开启事务，查询表内容，把张三的金额改成666，设置保存点s1，用自己姓名添加个新账户，金额888888，设置保存s2，回滚到s1保存点，再查询表内容；
+start transaction;
+select * from bank;
+update bank set money=666 where id =1;
+select * from bank;
+SAVEPOINT s1;
+INSERT INTO `bank` VALUES (4, '小小苏', 88888);
+select * from bank;
+SAVEPOINT s2;
+rollback to s1;
+select *from bank;
+
+-- 5，[作业]创建一个实现银行转账业务的存储过程transfer(),传入合适的参数如转出账户编号，转入账户编号，转账金额，返回是否转账成功。
+--  提醒.要考虑转出金额不足的情况
+```
+