How to convert the Drupal View Query to MySQL query?
Try the Views Show Query  module

This module shows real SQL query in Views UI during live preview.
'Real query' means it is rewritten by query_alter hooks. For instance, node access checks are added, so this requires selecting the user on behalf of which the query is supposed to be executed. So the module adds 'User ID to show final query' field in views preview form. You must enter numeric user ID in this field to view the real SQL query.
This module makes it possible to show SQL query not only during live preview, but when the view is executed normally. You can add footer to the view with the following PHP code:

&lt;?php
$rows = array();
$view-&gt;exposed_input['views_show_query_uid'] = 1;
views_show_query_views_preview_info_alter($rows, $view);
drupal_set_message($rows['query'][0]);
?&gt;

OR
There another module called Query Coder which Convert SQL query to Drupal Database abstraction layer code.