Low-Level Clear Drupal Caches

When we have been clearing the Drupal cache for several times, We can try with more drastical methods.
This's a database script to clear the cache phisically from SQL.

use dbdrupaltest;
truncate `cache`;
truncate cache_block;
truncate cache_bootstrap;
truncate cache_field;
truncate cache_filter;
truncate cache_form;
truncate cache_image;
truncate cache_menu;
truncate cache_page;
truncate cache_path;
truncate cache_views;
truncate cache_views_data;
truncate ctools_css_cache;
truncate ctools_object_cache;