new CDbCacheDependency("SELECT
MAX(t_places.sys_date_update),
MAX(t_category_cargo.sys_date_update)
FROM
t_places
JOIN
t_cargo;")
SELECT
( SELECT CONCAT( MAX( fd_config_item.date_created ), MAX( fd_config_item.date_edited ) ) FROM fd_config_item ) fd_config_item,
( SELECT CONCAT( MAX( fd_config_item_group.date_created ), MAX( fd_config_item_group.date_edited ) ) FROM fd_config_item_group ) fd_config_item_group