MYSQL 当前时间的描述 unix_timestamp() from_unixtime(seconds,'%Y%m%d') to_date(seconds,'%Y-%m-%d)'
select str_to_date('2008-4-2 15:3:28','%Y-%m-%d %H:%i:%s');
select str_to_date('2008-08-09 08:9:30', '%Y-%m-%d %h:%i:%s');
//设置隔离级别
set transcation isolation level read uncommited
#查询隔离级别
select @@tx_isolation
#开启事务
start transcation
隔离级别
read uncommited
read commited
repeatable read
serilizable