USE <DB_NAME>;
SHOW TABLES;

Grab site URLs

SELECT * FROM wp_options WHERE option_name = 'home';
SELECT * FROM wp_options WHERE option_name = 'siteurl';

**NOTE** Multisite setups are different.  Each site has their own set of wp_options, depending on your site, it may be set to different numbers.  Typically, it will be wp_2_options, wp_3_options, etc.

Replace values with what you want

UPDATE wp_options SET option_value="http://new_host/wordpress" WHERE option_name = "home";
UPDATE wp_options SET option_value="http://new_host/wordpress" WHERE option_name = "siteurl";

**NOTE** For multisite setups, make sure your wp_options match the number for the site in question.  

mysqli.default_socket = /path/to/your/files/mysql.sock

Issue: After moving your datadir for MySQL, WordPress will still not pull up and present the “Error connecting to the database” error.

RELATED ARTICLE(S):

1. Moving mysql datadir in Redhat (don’t forget SELinux!)
2. WordPress troubleshooting

Resolution(s):

1. Review and verify configurations

       (in this example, MySQL 8)
          - /etc/my.cnf.d/mysql-server.cnf
               datadir=/ & socket=/ set to the right folder?
          - /etc/my.cnf.d/client.cnf
               add the following lines under [client]:
                   datadir=/path/to/your/files
                   port=3306 

2. Grant SELinux permissions to the new folder

Run the following commands to change the datadir
#semanage fcontext -a -t mysqld_db_t "/path/to/your/files(/.*)?"
# restorecon -Rv /path/to/your/files

Run the following commands to change the mysql.sock file
# semanage fcontext -a -t mysqld_var_run_t "/path/to/your/files/mysql.sock"
# restorecon -Rv /path/to/your/files/mysql.sock 

RELATED ARTICLES(S)

After moving the above and restarting MySQL successfully, WordPress still would not load.

See the following article for help with troubleshooting WordPress: click here
See the following article for making sure PHP is configured correctly: click here

Error: After some investigation, you most likely are getting this error:

mysqli_real_connect(): (HY000/9002): SSL connection is required. Please specify SSL options and retry

Resolution: Believe it or not, this is a simple one. Azure REQUIRES that your connection to the database uses SSL.

Simply put the following line in your wp-config.php file and all will be well. I typically include a description for my own reference

/** Secure Connection to Azure MySQL db */
define(‘MYSQL_CLIENT_FLAGS’, MYSQLI_CLIENT_SSL);

If you are looking for MySQL command line, here are a few that may come in handy:

Database commands

• create database ‘databasename’;
• drop database ‘databasename’;
• show databases;
• use ‘databasename’

Backing up databases

• mysqldump -u username -p ‘databasename’ > dumpfile.sql

Restoring databases

• 1st option (from MySQL path):  mysqldump -u username -p ‘databasename’ < dumpfile.sql
• 2nd option (from MySQL prompt):
  • use ‘databasename’
  • source ‘pathtodumpfile.sql’;

Create and Permissioning

• Show all users: SELECT User, Host, Password FROM mysql.user;
• SHOW GRANTS [FOR user]
• GRANT ALL ON databasename.* to ‘databasename’@’localhost’ IDENTIFIED BY ‘password’ WITH GRANT OPTION;
• NOTE:  With any user changes, ALWAYS run:  FLUSH PRIVILEGES; (this will force the changes to go into effect)

Long/Short:  This is not possible to do, as the WordPress.com sites have built-in features exclusive to only WordPress’ own hosting platform.  Note in the article that you can only use Tools/Export to an XML file (or, of course, pay $129 and they will export everything for you).  When you do this, it only exports posts, pages, comments, categories, and tags.  It DOES NOT migrate your existing media uploads and images; these, you will have to migrate manually.  

Read more (from WordPress.com):  http://en.support.wordpress.com/export/

Resolution:  Export the XML file and import into your WordPress.org site as mentioned. If you have access to the MySQL backend, export the MySQL database to a .sql file, edit it and rename all the links to the new domain.  Download each file from the media library and import it into the new instance.  Remember to change the links to point to the right media file.

Problems:  Remember previous features may not be available, even if you use the same theme.  The themes they provide are customized and made easier for users.  If you need further help (design related), then you will need to find an experienced developer who can edit themes and customize it to your liking.