software

I'm accessing an external DB to retrieve Quantities and Unit Weights, e.g.
Customer A bought 3 items of product X, with unit weight 10, and Customer B
bought 5 items of product Y, unit weight 12. In a pivot table, I'd like to
get the total weight, so I created a calculated field, Total Weight, as
Quantity*Unit Weight.

That works fine for individual customers A and B: I get respectively 30
(3*10), and 60 (5*12). But the Grand Total of the table is wrong: instead of
90 (30 60), I get 176! What happens is that, to calculate the Grand Total,
the table adds all the Quantities (3 5=8), adds all Unit Weights (10 12=22),
then multiplies them (8*22=176)!

How can I use calculated fields, still get correct Grand Totals?

I'm using Excel 2003.

You should ask the database administrator to create a query that
calculates the total weight, then use that field in your pivot table.

In addition to problems with the grand total, you could get incorrect
results if Customer A has multiple orders for product X. In that case,
the Unit weight would be included per order, and multiplied by the
number of items. So, for 3 orders of 3 items each, the total weight
would calculate as 9*30, instead of 9*10.

JP wrote:
gt; I'm accessing an external DB to retrieve Quantities and Unit Weights, e.g.
gt; Customer A bought 3 items of product X, with unit weight 10, and Customer B
gt; bought 5 items of product Y, unit weight 12. In a pivot table, I'd like to
gt; get the total weight, so I created a calculated field, Total Weight, as
gt; Quantity*Unit Weight.
gt;
gt; That works fine for individual customers A and B: I get respectively 30
gt; (3*10), and 60 (5*12). But the Grand Total of the table is wrong: instead of
gt; 90 (30 60), I get 176! What happens is that, to calculate the Grand Total,
gt; the table adds all the Quantities (3 5=8), adds all Unit Weights (10 12=22),
gt; then multiplies them (8*22=176)!
gt;
gt; How can I use calculated fields, still get correct Grand Totals?
gt;
gt; I'm using Excel 2003.--
Debra Dalgleish
Excel FAQ, Tips amp; Book List
www.contextures.com/tiptech.htmlThank you, Debra. I conclude there's no way to do this within a PT itself.
Thanks for your quick reply, it saves me from wasting time looking for
something that doesn't exist...

quot;Debra Dalgleishquot; wrote:

gt; You should ask the database administrator to create a query that
gt; calculates the total weight, then use that field in your pivot table.
gt;
gt; In addition to problems with the grand total, you could get incorrect
gt; results if Customer A has multiple orders for product X. In that case,
gt; the Unit weight would be included per order, and multiplied by the
gt; number of items. So, for 3 orders of 3 items each, the total weight
gt; would calculate as 9*30, instead of 9*10.
gt;
gt; JP wrote:
gt; gt; I'm accessing an external DB to retrieve Quantities and Unit Weights, e.g.
gt; gt; Customer A bought 3 items of product X, with unit weight 10, and Customer B
gt; gt; bought 5 items of product Y, unit weight 12. In a pivot table, I'd like to
gt; gt; get the total weight, so I created a calculated field, Total Weight, as
gt; gt; Quantity*Unit Weight.
gt; gt;
gt; gt; That works fine for individual customers A and B: I get respectively 30
gt; gt; (3*10), and 60 (5*12). But the Grand Total of the table is wrong: instead of
gt; gt; 90 (30 60), I get 176! What happens is that, to calculate the Grand Total,
gt; gt; the table adds all the Quantities (3 5=8), adds all Unit Weights (10 12=22),
gt; gt; then multiplies them (8*22=176)!
gt; gt;
gt; gt; How can I use calculated fields, still get correct Grand Totals?
gt; gt;
gt; gt; I'm using Excel 2003.
gt;
gt;
gt; --
gt; Debra Dalgleish
gt; Excel FAQ, Tips amp; Book List
gt; www.contextures.com/tiptech.html
gt;
gt;