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1 total messages Started by Marshall Abrams Wed, 05 Aug 1992 23:07
@DSUM works fine after all--I blew it
#53
Author: Marshall Abrams
Date: Wed, 05 Aug 1992 23:07
48 lines
2672 bytes
I wrote:

> I've tried all of the database functions except @DSTD and @DVAR, and
> only @DCOUNT seems to work.  (This counts the cells in the input_range
> that meet the criteria in criteria_range.)  @DCOUNT works fine, but
> the other functions, including @DSUM, always return 0.
> .... (long explanation of example using @DSUM and @DCOUNT)

I can't believe I did this.  @DSUM, etc. work perfectly.  It's me that
screwed up.  I apologize for sending my mistake around the globe.

I made a really stupid mistake.  When I tested this at home, I had 3
columns in my database, rather than the single column in the example I
gave in my posting.  In the second argument to the @DCOUNT and @DSUM
formulas, I referred to column 1 when I should have referred to column
2.  i.e. in the spreadsheet at home, I had:

	@DCOUNT(A1..C19,1,G1..G2)
	@DSUM(A1..C19,1,G1..G2)

when I should have had:

	@DCOUNT(A1..C19,2,G1..G2)
	@DSUM(A1..C19,2,G1..G2)

Column 2 contained the numerical values to be summed, whereas column 1
contained only labels.  @DCOUNT works no matter which column you give
as the second argument; it's just counting records/rows--it doesn't
have to do anything with the contents of any particular field/column.
But @DSUM of course needs to sum a column containing numbers, and I
hadn't given it that.  Other database functions, such as @DAVG, also
failed because of the same problem.

I want to apologize not just for posting a problem based on a stupid
mistake, but also for posting as my example something that I hadn't
literally tried.  I was so sure that the example in my posting was
functionally identical to what I'd done at home.  But it wasn't.  If
I'd actually tried the example I posted, perhaps I would have seen my
mistake.  (In the example I posted, there was only one column--kind of
hard to get the column wrong when you've only got one column to choose
from).  I'm really embarrassed about posting the untested example.  I
should know better.

Thanks much to the people who spent time reading and replying.

Marshall Abrams
ab2r@midway.uchicago.edu
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