I understand somewhat MySQL. However, I want to become a pro in it. What's the best way to start? I want to learn how to link databases and other important things I need to learn.

P.S. - Please show me something other than MYSQL manual.

Have a browse at the MySQL site for training courses. http://www.mysql.com/training/

yep. found some interesting links there. Thanks

i would like to suggest a decent site that teaches good structure on sql http://sqlcourse.com

good luck in all your endeavors