How to display database structure in phpMyAdmin?
select DB, go to export, select tables that you want the structure (top left),deselect "DATA"(middle-center) and select a name and you will be able to export only the structure.



or go to your "database" then "check all" (just below the tables) and change the option from "With Selected:" to "print view".  it will show the relations too, and it will looks like this: