问题
By mistake I ran the update query. This update made my table all rows values as o.
Is it possible to rollback the table values?
回答1:
MyISAM does not support transactions. Therefore, every individual statement runs as if it is enclosed by a transaction. You cannot roll it back.
回答2:
If you have no backup, and didn't run your update in a transaction, your data is gone for good.
回答3:
MYISAM dont support transaction support..
That's the reason best you should be using INNODB..
来源：https://stackoverflow.com/questions/3404467/mysql-rollback-on-the-myisam-engine