Create new MySQL user and allow them to connect from any IP

If you are getting the error: user is not allowed to connect to this MySQL serverConnection closed by foreign host Or : Access denied for user ‘root’@’somehost.com’ (using password: YES)) Then you probably have not created your user properly in MySQL Here is how to create a new MySQL user and give him access to… Continue reading Create new MySQL user and allow them to connect from any IP

MySQL See all columns and tables that foreign key to a table or column

If you’re trying to understand how an existing database has been setup it can be very useful to see all of the tables/columns that foreign key into some other table/column. use INFORMATION_SCHEMA; select TABLE_NAME,COLUMN_NAME,CONSTRAINT_NAME, REFERENCED_TABLE_NAME,REFERENCED_COLUMN_NAME from KEY_COLUMN_USAGE where REFERENCED_TABLE_NAME = ‘your_table_name’ AND REFERENCED_COLUMN_NAME = ‘your_column_name’

Ruby MySQL Transaction Example

Here is a simple tutorial showing how to implement transactions in Ruby with MySQL. The code uses The MySQL2 Gem. We are showing the insert of 2 records into the customers table of a database. If either insert fails, both will be rolled back. require “mysql2” client_mysql = Mysql2::Client.new(:host =>; “localhost”, :username =>; “my_user”, :password… Continue reading Ruby MySQL Transaction Example