As the title states, I accidently emptied tables in the wrong database. I did not export the database before I did this (stupid me). Is there anyway to restore the database to a previous date/version, so that I may obtain the emptied data back?
There is no way to recover deleted data if you didn't make any backups. You could try to check the logs, but I doubt you will find anything. You have to be careful when handling important data.
Sorry for you, but you should automate your mysql backup (in this case you lose at worst one day of data). I use this script to do that : https://sourceforge.net/projects/automysqlbackup/
HTH
It was my habit to uninstall easyphp without losing my database...But this time, I've uninstalled my easyphp and re-installed it again, but when I tried to view my database, I see that all tables have been lost.
Actually, my tables are all empty, because I've just finished the database conception and I did not yet begun the project online.
But the tables are about 40 table, and I don't want to recreate them again.
so I've viewed my mysql directory, and I see that *.frm files with the names of my tables.
How can I recover my tables structure (not data) from those *.frm files?
I have tried and tried to do this after reading lots of suggestions on the Internet, but the answer is no.
Either find an earlier backup or, as I had to do, redo all your tables. This is taking me about 2 hours, but I'm going to back up my files a lot more often now :)
Use this as a learning experience.
Is it possible to restore table to last time with data if all data was deleted accidentally.
There is another solution, if you have binary logs active on your server you can use mysqlbinlog
generate a sql file with it
mysqlbinlog binary_log_file > query_log.sql
then search for your missing rows.
If you don't have it active, no other solution. Make backups next time.
Sort of. Using phpMyAdmin I just deleted one row too many. But I caught it before I proceeded and had most of the data from the delete confirmation message. I was able to rebuild the record. But the confirmation message truncated some of a text comment.
Someone more knowledgeable than I regarding phpMyAdmin may know of a setting so that you can get a more complete echo of the delete confirmation message. With a complete delete message available, if you slow down and catch your error, you can restore the whole record.
(PS This app also sends an email of the submission that creates the record. If the client has a copy, I will be able to restore the record completely)
As Mitch mentioned, backing data up is the best method.
However, it maybe possible to extract the lost data partially depending on the situation or DB server used. For most part, you are out of luck if you don't have any backup.
I'm sorry, bu it's not posible, unless you made a backup file earlier.
EDIT: Actually it is possible, but it gets very tricky and you shouldn't think about it if data wasn't really, really important. You see: when data get's deleted from a computer it still remains in the same place on the disk, only its sectors are marked as empty. So data remains intact, except if it gets overwritten by new data. There are several programs designed for this purpose and there are companies who specialize in data recovery, though they are rather expensive.
For InnoDB tables, Percona has a recovery tool which may help. It is far from fail-safe or perfect, and how fast you stopped your MySQL server after the accidental deletes has a major impact. If you're quick enough, changes are you can recover quite a bit of data, but recovering all data is nigh impossible.
Of cours, proper daily backups, binlogs, and possibly a replication slave (which won't help for accidental deletes but does help in case of hardware failure) are the way to go, but this tool could enable you to save as much data as possible when you did not have those yet.
No this is not possible. The only solution will be to have regular backups. This is very important.
Unfortunately, no. If you were running the server in default config, go get your backups (you have backups, right?) - generally, a database doesn't keep previous versions of your data, or a revision of changes: only the current state.
(Alternately, if you have deleted the data through a custom frontend, it is quite possible that the frontend doesn't actually issue a DELETE: many tables have a is_deleted field or similar, and this is simply toggled by the frontend. Note that this is a "soft delete" implemented in the frontend app - the data is not actually deleted in such cases; if you actually issued a DELETE, TRUNCATE or a similar SQL command, this is not applicable.)
If you use MyISAM tables, then you can recover any data you deleted, just
open file: mysql/data/[your_db]/[your_table].MYD
with any text editor
Can recover the data in MySql after the updation?I update the field and by mistake i lost the correct data..
No. This question has been asked multiple times already, the answer remains the same:
If you're in a transaction, you can ROLLBACK.
If you got backups or dumps, you can try to load and/or merge, and find the previous value.
Else: the value is gone.
Sorry mate, can't be done, there is no versioning in mySQL tables.
Backups, backups, and backups are, sadly, the only solution.
In case somebody comes up with an ingenious method I don't know about, at any rate 1. Stop the mySQL service and 2. if possible, stop doing anything on the machine the server runs on. But I doubt there is a solution.
I'm almost certain about the answer, but the situation is so critical that I have to ask this question even though I'm %99 sure about the answer.
Someone in our office made a backup of a MySQL database and he restored it on a wrong destination database overwriting everything on that destination (The schema of both databases were the same). According to the structure of the MySQL backup files I know that the restore operation drops all the tables first and then creates them and fills them up with the backed up data. The question is does the restore module keeps the old data anywhere? Is there anyway of retrieving any of the old data? (logs?.. etc.)
Only if you have replicated slaves, or you used to, and have binary logs. Even then you'd need an old copy of the database you can restore, and to configure replication again.