How to do undo in Mysql?

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Hi Everyone

I have changed all row in a column in a table.

I need the values. I don't have back up.

The data is very very important.

Any suggestions please.........

Please help me. :(

SwaxRak

Posted 5-Jul-11 0:20am

SwaxRak

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Sergey Alexandrovich Kryukov 5-Jul-11 6:41am

Undo?!!! in SQL?!!!
--SA

3 solutions

Solution 2

Only possible way is using DB transaction logs ... if there is one for mysql.

Posted 5-Jul-11 1:32am

Vertyg0

Solution 3

If you have no backup and you have no transaction then you have no data. Sorry.
The lesson here is to always back up your data.
Never test code in a production environment. Then you can always migrate the data backwards from production into your development environment.
Form good programming/system maintenance practices now while you are learning so that you don't do this in a professional environment where it will cost you your job.

Posted 5-Jul-11 17:11pm

fjdiewornncalwe

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OriginalGriff · Accepted Answer · 2011-07-05T00:24:00

Solution 1

Oops.

Unless this is within a transaction (and you haven't committed it) then your previous data is gone for good.

Sorry - but this is why good, regular, backups are so important.

Posted 5-Jul-11 0:24am

OriginalGriff

Comments

SwaxRak 5-Jul-11 6:30am

There is no way?????? :(

OriginalGriff 5-Jul-11 6:37am

No. I don't know of any database that offers an undo facility - think how much space it could use in a multiuser environment!
What they offer is a Transaction based system: the changes aren't permanent until you commit the changes to allow you to roll back in the event of a data problem.
Sorry - sound like you have a lot of typing ahead...

Sergey Alexandrovich Kryukov 5-Jul-11 6:42am

This is almost like "I low-level formatted my HD, how to undo it?" :-)
My 5.

Sorry for SwaxRak.
--SA