Is there an Order in which Transform Map transforms rows from staging table?

[Puneet Singh]

I want to have ordered transformation of rows in staging table . This staging table extends import set row and is populated from an excel sheet. 

There are rows that depend on one previously transformed row, thus I wan the execution to be in Order.

Can I specify my own ordering based on a column on staging table?

[Puneet Singh]

I don't see Mapping tab on the Transform Map UI. is there another way to set order By .