Base_Order_Expression as C = CURRENT_ORDER_EXPN()
CURRENT_ORDER_EXPN() returns the Base_Order_Expression of the primary table in a session. Can be used in a form or report, for example, to display the current order.
Alpha Five Version 5 and Above
To display the order expression that a report is based on, define a calculated field with this expression:
Query Functions and Methods, CURRENT_FILTER_EXPN()