Hey Guys so the other day I was running a database schema in the mysql workbench on my mac. I had added tables populated the data and tried to run some big queries. The server died and now when I connect to my local host instance I cannot find my database. However I can still see my database file in /usr/local/mysql/data/
Can any one help me work out how to start mysql server again and get it to load in the file?
I just dont' understand why it can no longer see the schema..
Connecting as localhost, using root, both workbench and terminal can't see the file. However the file is here:
The file I want is AM_DUMPS
When I try and load it from SQL Workbench I get:
Check to see if the data directory is owned by MySQL or mysqld is not launched as the mysql user. It looks like something along those lines. You may have to adjust the permissions to make sure that mysql is the owner.
Related
First ever Stack Overflow post, thanks for your time. Any constructive criticism on how to post better, please just let me know. I have done a search on my query and have found similar posts, but I was unable to use the information within them to resolve my problem.
I have created a mysql database using the terminal window in my Ubuntu system (which I am also new to, having been a lifelong windows user). I used the following code in the terminal window:
$ mysql -u root -p
Then once in mysql, I did the following
CREATE DATABASE securities_master;
USE securities_master;
I created a user and tables in the database using some other code, that doesn't seem relevant here, so I won't bother posting. However, I then decided I would like to take a look at the tables in the database, so I downloaded an SQLite browser. It was at this point that I realized I could not find my database file.
I tried to find the answer on previous stack overflow posts, and tried the suggestions of:
locate sqlite
locate .db
locate .sqlite
locate securities_master
But unfortunately, none of these showed the file I was looking for. The only place I can think of would be what is called the 'root' directory in my computer, but the Ubuntu file manager system won't let me view it because it says I don't have permissions. Is this where it might be?
Could someone shed some light on where I might be able to find this file/database? I know it is definitely there because if I try to CREATE it again, I get the message that it can't because it already exists.
Thanks again.
sqlite and mysql are two different databases. You can't use sqlite on a mysql database. sqlite is a single-file database, in which users just open the file and read and write to it, while mysql is a more traditional relational database system with a server and a client, where the server manages the database (which is generally in a directory of files), while the client just connects to the server.
Where the mysql database is located my depend on your system, but it's usually in /var/lib/mysql. You can look in /etc/mysql/my.cnf for the configuration file, which should have a datadir option that refers to where the actual data for the database is stored.
You can check my.ini file to see where the data folder is located.
Usually there is a folder {mysqlDirectory}/data
MySQL data storage:
Commands.frm
Commands.myd
Commands.myi
The *.frm files contain the table definitions. Your *.myi files are MyISAM index files. Your *.myd files contain the table data.
as mentioned in the answer before mine, mysql and sqlite are two different systems.
You mention you used the cmd line mysql to create the database and then wanted to view the tables. If you're simply trying to see which table are created, in the same command line you used to Create the database you can run show tables;
If you're after a GUI for this, we'd need a bit more context. Is this ubuntu system a remote server, or are you using the desktop version?
You say you're a long time windows user, If you're using windows locally, I personally like SQLWorkbench for accessing my remote mysql servers.
EDIT: I just re-read your post and realised you're using local ubuntu desktop so me mentioning remote was silly, my bad! However, SQLWorkbench does have a ubuntu version at https://dev.mysql.com/downloads/workbench/
I have a dead hard drive. I've connected it with SATA to USB IDE and can recover files. Also the filesystems looks good. How Can I get a dump of database from that hard drive. The laptop I'm using also has mysql installed in it. I'm using xampp. I've tried the following command.
G:/xampp/mysql/bin/mysqldump -u root -p uma > D:/umaoldbackup.sql
This is not giving dump of a latest data. And I think it's giving dump from my local computer.
Please help.
Correct, mysqldump connects to the running MySQL Server process on your local computer, not the data on your sick hard drive.
MySQL client applications like mysqldump do not read the data files directly. They connect to a MySQL Server process and make requests for the data. Before you can access that data, you need to restore the data files to the data directory of an instance of MySQL Server.
Stop the MySQL service.
Copy data files to the data directory of your MySQL service. Move any existing data files to someplace else that is safe, if you want to bring back that data after exporting your umaoldbackup.
Start the MySQL service so it can read the files in that data directory.
You should probably get someone to do this for you if you don't know how to start and stop services on Windows.
Re your comment about where is the data directory...
I'm not a user of Windows or XAMPP.
It's probably actually C:\xampp\mysql\data according to What is the exact location of Mysql database tables in XAMPP folder?
But you can confirm that by connecting to your current MySQL service with a client and running the following query:
SELECT ##datadir;
I am importing a mysql database from the webserver to my local system for a migration from drupal 6 to drupal 8.
I did an Export with phpmyadmin on the server. Then I created the database locally also with phpmyadmin and imported my dump from the server via phpmyadmin's import function.
Then I created the user with the setting of my drupal 6 configuration.
I can see the database in phpmyadmin if I connect with my local root user.
I cannot connect with the user created from the settings ( lets call that the drupal_db_user)
If I call the drupal site on my local apache ( apache & mysql server are running or my phpmyadmin would not work) I get the messeage from drupal:
"The mysqli error was: Unknown database 'my_drupal_db'."
Via Mysqlworkbench I am also not able to conntect to the my_drupal_db with the drupal_db_user.
I use locally php 5.6 and mysql 5.6 on a ubuntu system.
Creating the user and db via mysql console also did not help.
Any clue what might be wrong here? I suspect it could be the password encryption, but I have no clue how to check / change that other than trying the two options phpmyadmin (version 4.6) is offering me.
I guess you dont need to backup on your pc as the files that you exported from server is a backup on its own. Just download the sql file update to drupal 8 and finally import the file and you should have it installed.
Or simply try importing the exported file from server to another subdomain drupal 8 as a test. To check If it really works.
Found the problem.
after at least 3 hours poking around and cursing.....
When I created the database locally I had by mistake an whitespace in front of the db name.
Which by the way was possible... I didn't know you could even create databases with whitespaces in the name.
What let me find the error was this post:
https://drupal.stackexchange.com/questions/27050/fatal-error-pdoexception-sqlstate42000-1049-unknown-database
and the hint with this query:
SELECT * FROM my_drupal_db.users
which of course failed and made me really question the database name.
Hope that helps someone else saving 3 hours!
I have a file called database.dmp that is the mysql dump from the server last night. User is probably root.
I want to create a local copy on my computer 'MARK-PC' (I definitely do not overwrite the live database on the server).
What is the best command to do this?
1a. Can I use that command from the microsoft windows command prompt? I am not that familiar with the mysqldump command line and don't want to screw anything up.
Will I need to have root access?
If I set it up with another user/password, what issues will I run into if any?
I have a mySQL database on my Windows PC. I'm pretty sure I've found the relevant files, namely the following:
formula.frm
formula.ibd
db.opt
What is the natural way to inspect, edit, and generally play with the contents of these files?
You do not view the binary database files directly. MySQL is a service that you connect to with a client and then perform SQL commands. You will need a client (such as MySQL Workbench) to work with the server.
MySQL Workbench is the GUI tool that allows you to connect to a MySQL database and perform actions on it including querying and creating/modifying the various parts of the database.
MySQL Workbench intro: http://dev.mysql.com/doc/workbench/en/wb-intro.html
Getting started with MySQL: http://dev.mysql.com/doc/refman/5.6/en/tutorial.html
There is also the command-line utility that is included when you install the server. It will be in the BIN folder of the MySQL install directory.
Command-line client info: http://dev.mysql.com/doc/refman/5.1/en/mysql.html
Use a tool like Mysql Workbench to connect to the DB. You do nothing directly to the files. You connect to the service and use the DB.
William, it sounds like your question is "how do I take mysql binary files and turn them into something usable on my machine?". If that's the case, you'll want to first install MySQL on your machine if you haven't already. Then you might have a look here for how to recreate a database from a .ibd file.