Field TERNR in Table VTTK
There is a field TERNR 'Order No' in VTTK table. Just wants to know if this field is Sales Order No or some thing else.
it has domain AUFNR... which would be typically for "process orders" or "production orders"
(sales order VBAK-VBELN has domain VBELN_VA... and is in fact "shorter" than AUFNR)