Mysql

Altering column
Column types
Creating users
Determine which storage engine is being used
Selecting into a csv file
Indexes

Regular expressions

Setting a prinary key
Find duplicates
Test db for user creation
Update two columns
Selecting a table from a mysqldump file
Creating a mysql user
PHP mysqli_real_escape_string() Function
mysqldump to file with line terminations

Preventing database hanging when using mysqldump
Setting the root password
Users