From d82fd480696499e2aceecdf0ff2070286b82c63f Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E8=8B=8F=E9=B9=8A=E6=9D=83?= <1773509020@qq.com>
Date: Thu, 17 Oct 2024 09:28:41 +0000
Subject: [PATCH] =?UTF-8?q?=E6=8F=90=E4=BA=A4=E4=BD=9C=E4=B8=9A?=
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Signed-off-by: 苏鹊权 <1773509020@qq.com>
---
 ...40\344\270\216\344\275\234\344\270\232.md" | 51 +++++++++++++++++++
 1 file changed, 51 insertions(+)
 create mode 100644 "\350\213\217\351\271\212\346\235\203/20241017 \344\272\213\345\212\241\347\273\203\344\271\240\344\270\216\344\275\234\344\270\232.md"

diff --git "a/\350\213\217\351\271\212\346\235\203/20241017 \344\272\213\345\212\241\347\273\203\344\271\240\344\270\216\344\275\234\344\270\232.md" "b/\350\213\217\351\271\212\346\235\203/20241017 \344\272\213\345\212\241\347\273\203\344\271\240\344\270\216\344\275\234\344\270\232.md"
new file mode 100644
index 0000000..d071479
--- /dev/null
+++ "b/\350\213\217\351\271\212\346\235\203/20241017 \344\272\213\345\212\241\347\273\203\344\271\240\344\270\216\344\275\234\344\270\232.md"	
@@ -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
+```
+
-- 
Gitee