If you don't UNinstall the module, it will not completely re-install. Also, uninstall will delete the table, you don't have to do it manually.
Nancy
Injustice anywhere is a threat to justice everywhere. -- Dr. Martin L. King, Jr.
From: Kamal Palei
I am facing a strange issue. Want to create a table during install of my module. My install file looks as below. My custom module name is resmsubmt. I have tried several hours (with clearing cache etc..), only 1 time I saw the table was created. I deleted that table manually (using phpmyadmin and sql statement). After that I cleared cache, tried with different table names , always I find the table is not created after installing and enabling my module. Drupal shows module is installed successfully, I enable the module, I do not get any error, then why table is not getting created?