There are several techniques, some of which may be (depending on your input SAS dataset):
1) SAS PROC SQL to read your "another SAS dataset", summarize to daily totals and generate report.
2) SAS DATA step to read your "another SAS dataset", translate those SAS variables/columns to conform with your "SAS shell dataset", summarize to a "daily" totals SAS temporary file, and then generate a report, possibly using either PROC PRINT, PROC REPORT, DATA step?
It's undetermined if you intend to maintain some "running daily totals" from your stated "SAS shell datasets" or if you are in a position to use SAS code to re-read the daily files and create some weekly/month "totals" perspective in report-format.
Questions to ask are how/where is the SAS-generated output/report information to be hosted, in what format, and how will historical report versions to be maintained?
This information is just the start to developing a SAS-based application, given what you have explained thus far - a good start though.
The SAS support
http://support.sas.com/ website has much information such as technical/conference papers and SAS-hosted documentation for reference and use.
Scott Barry
SBBWorks, Inc.
SAS 9.2 DOC: Reading, Combining, and Modifying SAS Data Sets
http://support.sas.com/documentation/cdl/en/lrcon/61722/HTML/default/a001125856.htm
SAS 9.2 Documentation - referenced by topic category:
http://support.sas.com/cdlsearch?ct=80000