How to pull data from the Drupal database using the Drupal 7 ajax

How to pull data from the Drupal database using the Drupal 7 ajax

References

Reference NO 1

http://stackoverflow.com/questions/15201179/how-to-pull-data-from-the-drupal-database-using-the-drupal-7-ajax

Reference NO 2

http://stackoverflow.com/questions/11341399/drupal-7-how-to-change-multiple-drop-downs-using-ajax

Reference NO 3

http://codekarate.com/daily-dose-of-drupal/drupal-7-module-development-part-7-database-api-displaying-data

Reference NO 4

https://api.drupal.org/api/examples/ajax_example!ajax_example.module/group/ajax_example/7

Reference NO 5

https://api.drupal.org/api/search/7/data

Reference NO 6

http://drupal.stackexchange.com/questions/24115/call-drupal-php-function-from-javascript

Reference NO 7

http://www.phpgainers.com/content/post-data-using-jquery-json-and-ajax-drupal-7-programmatically

Reference NO 8

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