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/
Related
I have an error with Xampp where it will not connect to my database. I have had this error several times in the past and no solutions have helped. I find that uninstalling and reinstalling ends up being the fastest method, however, by doing so I lose my database tables. As I have no access to the default export and import functions, I was wondering how I transfer the tables across.
Last time, I copied and pasted these files into the same directory when I reinstalled Xampp and the tables transferred but the data within did not. The tables had also lost some functionality as well.
If anyone has any methods to do this I will greatly appreciate it.
The best way to backup and restore your data is to dump the database to an SQL file. You can use the provided mysqldump tool for that, which is the best tool for the job.
Copying the entire MySQL "datadir" (which is probably one level up from the screenshot you've posted) and completely replacing one of your new stopped MySQL instance will probably work, but is not reliable and is not supported. Since there are other files (such as ibdata1) that handle the overall health and functioning of the entire MySQL instance, you can't only copy over individual database directories. Furthermore, you should only do this when the original and replacement MySQL servers/daemons/services are completely stopped because otherwise there are file corruption or concurrency issues.
Since you're running the server on your own computer, you should grant yourself sufficient access to be able to use mysqldump and use that regularly as a backup, since file-level backups of the data directory are not reliable.
Running WAMP localhost server With php 5.6.18 and MySQL 5.7.11 In project that im working on now i need to get some column data form information_schema.COLUMNS table, but information_schema DB is completely empty - 0 rows for every table in this DB For additional information - I have like 10 differnet DB on this MySQL, some are imported some are made from scratch in phpmyadmin.So im completely lost - tried to google but no luck.Maybe i miss something essential and trivial like some configuration of MySQL?
Execute this query:
mysql> SHOW GRANTS;
This will show you that either you are not logging in as the user you intend to use, or that this user lacks permissions on the tables in question.
In this case, the user may have no permissions at all. MySQL has a special permission called USAGE, which may seem slightly deceptively named if you aren't familiar with what it means. It means you can "use" the server -- that is, you can log in. But that is all it means. If you possess only the USAGE ON *.* privilege, this means you have permission to log in to the server, but no permissions on anything else.
The information_schema is integrated with the permissions system. You can't see information about database objects for which you don't have permissions. An empty information_schema.columns table suggests a permissions issue for the user you are using to connect to the server.
Sometimes this may be issue when you copy and paste the database's folders in mysql folder. Don't copy that way. The best way to export the databases using "export" command in "phpmyadmin" or use "mysqldump" command in mysql command line client to copy the data or export data from one to another.It will generate "yourdata.sql" file at the last , You can import that data using "export command in "phpmyadmin" . In your method is successful for "MyISAM" database driver in mysql. Modern mysql servers default database driver is "InnoDB" and it not success in when copy the database data folder on to another machine. If you have copy of previous copy of the databases from the old machine, try to export the "yourdata.sql" file using export method in "phpmyadmin" web interface.
I faced same problem when I transfer/shifted my mysql folder to other location.
And configured DB to point Mysql folder accordingly.
However, Information_schema was not getting updated though rest DB queries were running fine.I could't find proper solution but the way around was from mysql editor (like workbench) do inspect schema.
You will get an option in bottom to 'Information Outdated' and then click on Analyze table. You will find that Information_schema start calculating correct size and other details.
I've got a database (all MyISAM tables) and the machine where MySQL was running is no longer bootable. However, we have all the MySQL data files from the data directory. How can I restore the data from the MYD and FRM files, or whatever other files I should be looking at in the data directory?
I've been doing some searching on this and it sounds like for MyISAM I should just be able to copy the database subdirectory from the old MySQL data directory to the new MySQL data directory. However, that's not working for me. A database with the name of the database I'm trying to recover shows up in the list of databases in phpMyAdmin, but all the tables show "in use" and have no information (e.g., number of rows, number of bytes, column information, etc.). Any operation on those tables (e.g., SELECT * FROM {table}, REPAIR {table}, CHECK {table}) returns a "no such table" error.
One of the tools I ran across in my search is DBACentral by MicroOLAP. It's got component that's supposed to restore data from FRM/MYD files, but when I tried to run it, it didn't list any tables that it could recover from my FRM/MYD files.
This is on a developer workstation that's running Vista Business 32bit. MySQL version is 5.0.27. After fixing the machine, I went and got the exact same version of MySQL (v5.0.27), thinking that if I'm just going to drop in the binary data files I should do it with the same version of MySQL. It still didn't work.
Any insights would be greatly appreciated... thanks!
-Josh
Install the same version of mysql.
Remove mysql directory from data directory of the server and copy it from the crashed server. This is the key element
copy directory of database you want to recover into data directory of new server
start mysql.
switch to mysql database: USE mysql; and run REPAIR TABLE <table name> on every table.
Do the same with database you want to recover
tip: make sure the 2 directories have the same permissions like data directory
If you did not save mysql database (mysql directory in your old server's data dir, then you can try to:
create database with the same name as database you want to recover.
Then you can create each table (it would be good to use the same structure - you'd have bigger chance of recovery).
then stop mysql server and delete files from database directory and overwrite them with files from old server
start mysql and repair each table.
I wound up giving up. I think the answer is that, with my particular version of MySQL, this doesn't work. Hopefully things have improved since then.
Sorry for a noob question regarding MySQL. I downloaded FlightStats to learn about mysql but I can't figure out how to register it with my localhost mysql db. I know in MS SQL you can simply register any sql db using sql studio. I tried to google but come up with no result. Perhaps, my search phrase is wrong. I'm searching with "how to register a mysql database, register a mysql database...etc.". How do you register or setup an database from existing database like FlightStats? I'm using DBVisualizer. Is there a way in dbVis that I'm not aware of to regsiter a database?
Thanks
edit: sorry for the bad wording. I found this. I have the .myd, .myi and .frm and I want to get it to restore(?) with my local mysql instance. I look at all the answers but I'm still confuse as how you restore the database from those 3 files.
A little background first. The FlightStats download page linked to in the original question appears to provide zipped tarballs of the binary table storage files from the MySQL data directory. Given that this is considered a viable means of distribution, and combined with the use of MERGE tables, I would surmise that this tarball contains a bunch of MyISAM data files (.myi, .myd). Jack's edit confirms that this is the situation.
This is an atypical means of distributing a MySQL data set, although not at all uncommon when backing up MyISAM storage, and probably not all that unheard of for moving large data sets around; it likely works out considerably more space-efficient than a corresponding dump file. Of course, in SQL Server land, it's pretty common to attach database files into an instance.
Broadly speaking, you'd recover the database as follows:
Locate the MySQL data directory; typically /var/mysql or similar
Create a new directory with the desired database name e.g. flightdata
Extract the .myi, .myd and other files from the tarball into this directory
Make sure the entire directory is owned by the user MySQL runs as (usually mysql) - use chmod -R to make sure you get everything
Open a MySQL console
USE <database-name>
SHOW TABLES
You should see some tables listed. In addition, the downloads page linked includes a couple of SQL scripts, which contain SQL commands that you need to run against your database once it's in place. These will cause the merge definitions and table indexes to be rebuilt. You can pipe these into the command-line client, e.g. mysql -u<username> -p<password> <database-name> < <sql-file>.
It may be a good idea to shut down the MySQL server while you're doing this; use e.g. /etc/init.d/mysql stop or similar, and restart once the files are extracted in place.
There's generally a way to import sql files using a GUI database tool. I'm not familiar with DBVisualizer, but as long as you have a MySQL command line client installed you can do it there as well. It's pretty easy:
Create a blank schema. You can do this in your GUI tool or on the command line client. Just use CREATE DATABASE flightstats;, or whatever name you want.
Use the following command line syntax to import/run an sql file on the new schema: mysql -u <username> -p flightstats < /path/to/file.sql
The -p option prompts for a password. I generally set up the database using step 1 as the root user, then GRANT some permissions on it to a new user id, then use that user id to run the SQL file.
This process is pretty much what a GUI tool will do in the background.
Registering a database? dont know what that means however mysql gui tools can help you creating a database. Have a look at it or better you download phpmyadmin.
Google WAMP for Windows.
Google MAMP for Mac.
Google LAMP for Linux.
Any questions?
I can not use MySQL. MySQL is on my local computer. Currently I added skip-grant-tables in My.ini so I can use MySQL. But I have no privilege to create a new database. My problem is tough, although I asked related questions on SO, but no answer can resolve my problem. I almost give up. So I lower my expectation. I am developing a website, so I need to create database, tables and operate tables. You don't have to consider security. Is there a simple solution that can give me privilege to create a new database? Maybe by adding some command in my.ini or something? You won't need to completely resolve my problem. Maybe after the development, I will upload the database and tables to another server(The current database server is my personal computer, windows XP) so I can uninstall and reinstall MySQL.
The root of problem is that I lack privileges.
I'm not sure if this will work for you, since you might need to have elevated privileges in the first place, but it's worth a shot.
There should be a database called mysql. Take a look in there, and you'll see a table called users. For each record, there's a heap of columns named Select_priv, Insert_priv, etc. For your user record, change each of these to "Y".
It sounds a bit like your installation went astray.
Maybe uninstall/resinstall is your best option, assuming that you've never been able to connect, so there is no data to consider.
Take your time on the installation, and have a look at MySQL Postinstallation Notes
you have 4 questions open about this specific problem. instead of opening duplicates, you should instead update just one of them with new information.
but the simple solution to your problem is to download the ZIP file of mysql for your mysql version from the mysql website and just copy the data\mysql folder in to your data file, then restart the service. this will give you a root user with a blank password that has full access.