I need to do a nested lookup on a query tag of datatype Dataset.
I want to pull back a datatype string from Tag type Expression.
My expression will do lookup()
My data has a bay number column and preset number column. I want to look for bay number X AND preset number Y. This correlation should only give me 1 row and then i want to return the value in column “file_code”.
Is there a simple way using expression language?