I have a user Database that I managed to recover after a Hardware failure, however when I try and import it to my new MYSQL database in PHPMyAdmin it says that it cannot read it due to it being for another version of MYSQL. I have no idea what version of MYSQL my older corrupted server was?
I'm having to get my customers to manually re-register and me setting everything up manually again which is going to take hours.
The file I have is "users.MYD". Is there any way of importing ignoring compatibility issues?
My advice is to install the same version of MySQL that you previously had, stick that MYD file (and others) into it, start MySQL, mysqldump out the data and then insert that into your new MySQL database.
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After much searching around, it does appear that the problem here is that the old database was a MySQL 4.1 database (or older), and you can't install MYD/frm files from a 4.1 db on to a MySQL 5.0 database - the way to do that is to mysqldump the data and import it into the new database. The challenge here therefore is to find a MySQL 4.1 database, which probably involves installing a very old operating system.
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Today I uninstalled the Mysql server(5.0) from my computer and saved a copy of the data folder. After then I installed a version of Mysql 5.7.38 and it worked fine then I transferred the date folder's data to the new version of mysql's data folder. It even showed the databases on using the command but when I tried to view the tables in the database it gave and error that p.gabs does not exist (p was the database name and gabs was table name in it).
So I again uninstalled the version and I am reinstalling it.
So I am asking if there is a way to do this easily that I may use old databases in newer version.
P.S. I am using Mysql only at a beginner level. So no big server or stuff ..
I've read several posts on this forum and others and still can't read some MYD/MYI/FRM files which contain data that I want to import into SQL Server.
I stopped the MySQL service at the client location and copied all the files (the same way that we would do with SQL Server).
I have installed the most recent MySQL ODBC connector, MySQL engine and MySQL Workbench on my Windows 10 PC. The engine is running and the ODBC connector is configured with a username and password. Using the workbench, I have been able to successfully log in.
I created a MyTest database which created a C:\ProgramData\MySQL\MySQL Server 8.0\Data\mytest folder.
I stopped the MySQL service and copied MyData.MYD, MyData.MYI and MyData.FRM to the mytest folder.
I restarted the MySQL service.
But if I run a "Select * from mytest.MyData" query in the workbench or using the MySQL 8.0 Command Line Client, it keeps indicating that the table mytest.MyData doesn't exist. Now, I read that it might be appropriate to run a CHOWN command but I don't know what if syntax would be different for a Windows system and whether this command would be executed directly from a Command prompt.
Any assistance would be greatly appreciated. Thanks!
Older versions of MySQL let you get away with that for MyISAM tables, but MySQL 8.0 introduced a whole new implementation of "data dictionary" which is a meta-database maintained internally, and it has a bias for InnoDB over MyISAM. So I would believe that moving files around ad hoc no longer works as it once did. To move tables from one instance to another, you should really do the export and import steps properly.
For InnoDB, you may use transportable tablespaces. At least you don't have to do a full data import that way, but it takes a few more steps than just file copy.
P.S.: I haven't used MyISAM in many years anyway. I prefer my database to support ACID properties, and MyISAM does not support any of the ACID properties.
I would like to know How to restore MYSQL database after installing a different version of Wampserver. The explanation is as below:
I deleted the wampserver folder accidentally and I lost my MYSQL database. However, I have succeeded to restore the data folder that contains the database and I have installed another version of Wampserver (Actually, the old version of MYSQL that I was using was 5.5.8 , and the MYSQL version that I am using right now is 5.6.17) and I have tried to restore the database by copying its folder and putting it and the old ibdata1 file under the data folder of the new installation. But, unfortenately, that doesn't work.
So, my questions are:
Is it possible to restore MYSQL database after installing a different version of Wampserver (with a different version of MYSQL)?
If yes, how can I do that? What would be the solution?
In the past when this has happened to me, the only option that worked was to reinstall an older version of WAMP (i.e. MySQL) to match what my databases were created in originally.
If you install the same WAMP again, copying the folder should work now.
If you can gain access to your databases at this point, then you can do a proper backup of them using phpmyadmin or mysqldump etc.
After you get a proper backup, remove the older WAMP version and install the latest version again. Now you have to restore the databases using the backup files in order to put them into the newer MySQL version.
If you backed up your database you can restore it using your backup file. If you are using a graphical interface for mysql like PHPMyAdmin there is a import button you can use to import your .sql, .csv, .zip, or what ever extension you used to backup your database.
I trying to migrate my Expression Engine site from one sever to another.
I was using MySQL version 5.1 but on my new server I’m using version 5.5.
I've just copied over the Database from the Data Directory on the old server to the new and my site wouldn't function correctly.
When I restore my Database with a MySQL Dump file from the old server, the site works.
Is there an issue with copying and pasting a MySQL database from one server to another and why is the MySQL Dump restore not effected by the same issue?
I'm trying to use this information to provide a good backup solution.
The dump and restore method works because the dump file is basically just a bunch of "CREATE TABLE" and "INSERT" Statements. The dump and restore rebuilds the database from scratch using basic SQL statements. Copy and pasting doesn't work because you are moving between different versions of the database with different data formats. If you are moving between machines with the same version of MySQL and the same configuration, then simply copying the data directory can work, assuming you do it properly. Using the dump / restore method is the most reliable way, but is often very time consuming on large (think 50 GB or even much larger) databases.
The best backup solution is to dump the SQL rather than copying files.
mysqldump utility provides a full dump of all of the data that is compatible (IIRC) all the way down to MySQL 4.0 using it's conditional statements.
I have a feeling that the reason copying data directories between 5.1 and 5.5 is because the engines may have changed the way that they store their data. I had an issue like this related to InnoDB and it was a pain in the behind. Long story short I never got the data back and unfortunately didn't have an SQL Dump (the hard drive failed!).
Anyway at the end of the day, mysqldump is the best tool to use as it creates compatible SQL statements which should work across a whole plethora of MySQL Versions, both past and future.
I haven't looked into the details, but the MySQL data files are binary files and may not be directly compatible between versions. The files produced by MySQLdump are simply a list of SQL instructions to recreate the database, so they will be more compatible between versions, though not necessarily backwards compatible, so you may have trouble going from 5.5 -> 5.1 if you ever had to.
I needed to re-install my computer but I didn't think about exporting the data from mysql 5.
How do I get the data from the old installation into the new installation, is this just copying the data directory or do I have to take other steps to get to the data?
For MyISAM tables you can generally get away with copying them across. (Whilst the server's stopped, obviously.) For InnoDB, it can work, but you'll have to have the same basic block size settings. If you can use the same major version of MySQL and the same my.cnf you stand a good chance of having it work.
Afterwards it's a good idea to ensure the tables are rebuilt (eg. using ALTER TABLE), and make a note to mysqldump properly next time because none of this is supported or guaranteed to work!
I would export your data as a sql file from mysql (ie: with phpmyadmin) and then import it into the new installation. Your db should be built and filled with data pretty easily.
You said that you "didn't think about exporting the data". Does that mean you don't have access to the old installation any more?