Query designer guide can be found in the Reporting Gdrive :

https://drive.google.com/drive/#folders/0B_fH_eB4PSMwc1ppRXVrVXh0ZXM/0BwtAGBKWM-z-c3ZMaTdXNU5RTTg/0BwfSNqWU_-PsTFJ2VmhqSXUySkE/0BwfSNqWU_-PsQzg5RVJ4VDZ1amc/0BwfSNqWU_-PsS00wTmlxell0SjA