initial commit
change for 2013b to grouping
converted ETL to 2013b
working refinements
more refinements
dynamic working
commented
new keys to group by
using grouping
first and last implemented
clean up
max min
count
count
grouping all done with etl ops
average working for one column
average with multiple columns
sort by first and last variables too
policy now long; commented ETL
drop unused columns