Hi,

Try this ARRAY formula. Put it in C2, ARRAY enter it (see below) and drag down

=MIN(IF($A$2:$A$6=A2,$D$2:$D$6))

This is an array formula which must be entered by pressing CTRL+Shift+Enter
and not just Enter. If you do it correctly then Excel will put curly brackets
around the formula {}. You can't type these yourself. If you edit the formula
you must enter it again with CTRL+Shift+Enter.


--
Mike

When competing hypotheses are otherwise equal, adopt the hypothesis that
introduces the fewest assumptions while still sufficiently answering the
question.


"khaled shaheen" wrote:

Hi all,
I badly need your help in the below formula

Example:
Structure : Account includes Sub-accounts and each sub-account includes dials

Formula : Account activation date = Oldest Sub-account activation date
where there is more than one account and hence different activation
date for each account and in turn the sub-accounts that belong to each account

Below the example

A B C D
Account # Sub-Account # Account Sub-account
activation activation
date date

2 2.11 ?? 21-01-2010
2 2.12 ?? 26-01-2010
2 2.13 ?? 03-02-2010
3 3.111 ?? 14-02-2010
3 3.112 ?? 29-04-2010

Account Activation date for account#2 shall be 21-01-2010 (Oldest
sub-account activation date)

Many thanks,
Khaled