I don't want to drop database,
because I'm not hosting the website on my own machine,
drop the database will require create it again,and many settings.
Is there a command in MySQL that can be used to delete all tables in a specific database?
EDIT
Everything I can do is within a phpMyAdmin
You were talking about doing this in phpMyAdmin.
I just had to do this and I'm not sure what version you are using but in the version I have if you scroll to the bottom of the table list you can click "Check All" and then in the drop down next to it that has "With Selected:" you can select "Drop" and it empties all the tables.