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Findling last date a product was sold in Excel

Posted on 2014-03-28

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Last Modified: 2014-04-08

I have a spreadsheet with about 500K lines that has customer number, product number, invoice date, price, etc. for all products that our company has sold in the past 2 years. Some products have only been sold one time to a customer but most have been sold many times.

Here is an example:

Cust#	Product#  	Date Sold	Price
5672	100WX202	05/01/13	$155.20
234123	550MP200X20	06/16/12	$12.60
2356	663405T12	01/04/13	$45.60
51190	100WX202	07/11/13	$124.70
5672	100WX202	03/01/14	$142.10
234123	550MP200X20	06/16/14	$12.60

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I need a new spreadsheet showing what the last price each customer paid for each product they purchased from us. Here is what I would need from the above example:

Cust#	Product#  	Date Sold	Price
5672	100WX202	03/01/14	$142.10
234123	550MP200X20	06/16/14	$12.60
51190	100WX202	07/11/13	$124.70

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Any help would be appreciated.

Mark

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Question by:9thTee

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3 Comments

LVL 39

Accepted Solution

by:nutsch

nutsch earned 500 total points

ID: 399629372014-03-28

In the attached file, I'm taking your data, copying columns A and B to another part of the sheet (or another sheet), use Date\Remove duplicates to only get unique values, then use two array formulas (entered with Ctrl+Shift+Enter instead of Enter) as follows:

for last date
=MAX(($A$2:$A$7=H2)*($B$2:$B$7=I2)*$C$2:$C$7)

for price
=INDEX($D$2:$D$7,MATCH(H2&I2&J2,$A$2:$A$7&$B$2:$B$7&$C$2:$C$7,0))

For 500klines, it's going to get slow though, maybe going through MS Query or a form of database might be a faster bet.
ee-match.xlsx

LVL 39

Expert Comment

by:nutsch

ID: 399629712014-03-28

Another option, that might compute faster is to put the following formula in an adjacent column and filter the True values (which are your maximums) to copy to another sheet.

=COUNTIFS($A$2:$A$7,A2,$B$2:$B$7,B2,$C$2:$C$7,">"&C2)=0

Thomas

LVL 46

Expert Comment

by:aikimark

ID: 399642282014-03-29

I used a pivot table to get this view of the max dates

Max of Date Sold		
Cust#	Product#  	Total
2356	663405T12	1/4/2013
5672	100WX202	3/1/2014
51190	100WX202	7/11/2013
234123	550MP200X20	6/16/2014

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