Ingres under Ultrix

[Dick O'Connor]

We're just getting started on a campus machine running a test version of
Ultrix (4.0) and I need to get some familiarity with Ingres on this OS.  
I have lists of documents published for UNIX systems by the Ingres Corp.,
but I can't figure out the difference between SQL and QUEL.

I assume these are both versions of structured query language, but there
are apparently separate reference manuals for each, separate "ESQL" and
"EQUEL" User's Guides, separate ESQL and EQUEL companion guides to Fortran,
and so on.  Since I have to purchase 3-4 sets of documentation, I'd
like to know a bit more about why one would use one (SQL) approach in 
preference to another (QUEL).  Can anyone help me out of this alphabet soup?

Thanks very much.  If there seems to be interest in the results, I'll
summarize and post any info I receive.

"Moby" Dick O'Connor                            ** The only difference between
Washington Department of Fisheries              ** a lazy man on a riverbank
Olympia, Washington  98504                      ** and a fisherman is a pole
Internet Mail: djo7613 at blake.u.washington.edu   ** and a length of string.