For lack of a better way to categorize my MySQL page tips & tricks, I'm just gonna go random:
How to find out if you have mysql server in your machine:
$ netstat -lnp | grep mysql
$ ps -ef | grep mysqld
How to add a column to an existing table:
mysql> ALTER TABLE projects ADD project_name decimal(8,0) unsigned NOT NULL DEFAULT 0 AFTER project_type_id;