You could use a SUMPRODUCT() formula:
=SUMPRODUCT((C8:C10008="John")*(MONTH(A8:A10008)=1)*(D8

10008="Bill"))
But with 10,000 rows of data it may be bit slow.
You could also use a Pivot table whch is much faster.
I would suggest something like:
With your data as given in columns A, B & C from Row 7 down, insert a new
Column B labelled in B7 as Month with the formula =A8 in Cell B8 and copied
down. Then creat a Pivot Table with Month & Team Member dragged to the Row
Field and Customer dragged to the Column & Data Fields making sure that the
Data shows a "Count of Customer"
--
HTH
Sandy
In Perth, the ancient capital of Scotland
and the crowning place of kings
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"Beginner" <(E-Mail Removed)> wrote in message
news:0AEA0789-FC2A-4738-B826-(E-Mail Removed)...
> Here is my problem:
>
> I need to show how many days in a month a team member saw a customer. Each
> day a team member could see multiple customers. I just need the number of
> days per month he saw a customer. I have over 20 team members and
> thousands
> of customers. This data runs for 10,000 rows. I can't figure this one out.
> Any help is greatly appreciated!! Here is how the data is set-up:
>
> Date Team Member Customer
> 1/1/2007 John Bill
> 1/1/2007 John Jerry
> 1/2/2007 John Karen
>
> Thanks in advance!!
>