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How
do I access My database?
Your Account Database is already initialized by default and ready
for your use.
From telnet, type: mysql -p
It will prompt you for the database password.
You can also access it with the following commands:
mysql -u my_user_name --password=my_password
mysql -u my_user_name -p
Your User Name and Database Name are both the same as your
RWH account name.
How do I change my mySQL password?
First, log in to your mySQL database from a shell prompt. Then
issue the following command:
set password=password('new_password');
where new_password is the new password you
have selected.
Example
set password=password('charlie1');
What is the mysql port number?
The port is the default standard port: 3306. Most programs like
PHP and Perl DBI will take this port if it is not specified.
How do I backup or transfer my database?
mySQL databases are not backed up like ordinary files. Even if
it were possible, it would not be a good solution, as it could corrupt
the database by doing so.
To back up your database, telnet to your account, then use the
mysqldump command:
mysqldump --opt -uUSERNAME -p databasename > /path/to/dump.sql
('db.sql' is the name of your backup dump file, which you can change
to whatever name you choose)
That backs up the whole database in standard SQL text format. Both
the structure (like CREATE table command) and data
(like INSERT command) statements, can be backed up
separately, which is usefull in many cases. Check:
mysqldump --help
for all the command line options.
To restore the dump, just type:
mysql -uUSERNAME -p newdbname < /path/to/dump.sql
Note that the structure dump won't work if tables already
exist. The backup will not change or replace the structure.
For the data dump (the INSERT commands) it will append any new
data if it does not yet exist.
If you have a database that is in frequent use, such as one linked
to a dynamic web interface being updated by your web site visitors,
it is a good idea to make a daily backup of the data.
To transfer a database, create the dump as described above, use
ftp to upload it on the second server, and then restore it as above.
Backing up the database is not done through an ftp database directly.
You first need to generate an sql dump, and then download this dump.
Use the following mysqldump command:
mysqldump -ppassword username > somefile.sql
Then use the following command to view the dump:
(exit with: q!)
To put the file back:
- upload the file
- edit it with a text editor, adding the below line to the top:
use databasename (which is the same as your username)
- save the file and issue the command:
mysql -ppasswd < somefile.sql
All of the database will be generated, including structure. For
more details, use
How is 'mySQL' pronounced?
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