目录
事务
Start transaction;
结束事务
提交 commit;
取消 rollback;
设置事务隔离别
Set session transaction isolation level 隔离级别；
事务隔离级别
Read uncommited 读未提交（脏读）
Read committed 读提交（不可重复读）
Repeatable read 可重复读（幻读）
Serializable 可串行化
create database chapter06;
-> use chapter06;
-> create table account(
-> id int primary key auto_increment,
-> name varchar(40),
-> money float
-> );
-> insert into account(name,money) values('a',1000);
-> insert into account(name,money) values('b',1000)/
select*from account/
start transaction;
-> update account set money=money-100 where name='a';
-> update account set money=money+100 where name='b';
-> commit/
select*from account/
start transaction;
-> update account set money=money+100 where name='a';
-> update account set money=money-100 where name='b'/
select*from account/
select*from account;
start transaction;
-> update account set money=money+100 where name='a';
-> update account set money=money-100 where name='b';
-> commit/
select*from account/
start transaction;
-> update account set money=money-100 where name='a';
-> update account set money=money+100 where name='b'/
rollback/
set session transaction isolation level read uncommitted/
start transaction;
-> update account set money=money-100 where name='a';
-> update account set money=money+100 where name='b'/
