ttExecute("UPDATE `tt_site_config` SET param_value = '1.18.49', modified = now() where param_name = 'version_db' and param_value = '1.18.48'");
ttExecute("ALTER TABLE `tt_timesheets` ADD `project_id` int(11) default NULL AFTER `client_id`");
ttExecute("UPDATE `tt_site_config` SET param_value = '1.18.50', modified = now() where param_name = 'version_db' and param_value = '1.18.49'");
ttExecute("UPDATE `tt_site_config` SET param_value = '1.18.49', modified = now() where param_name = 'version_db' and param_value = '1.18.48'");
ttExecute("ALTER TABLE `tt_timesheets` ADD `project_id` int(11) default NULL AFTER `client_id`");
ttExecute("UPDATE `tt_site_config` SET param_value = '1.18.50', modified = now() where param_name = 'version_db' and param_value = '1.18.49'");