Thanks for the information but I am having a little trouble. Not a
surprise... :)

I used this function but I am getting an error(#NUM!) and I am not sure why.
I am working off of two sheets of data. My expression looks like this.

=SUM(N(FREQUENCY(IF('Raw Data'!E:E=C2,MATCH('Raw Data'!C:C,'Raw
Data'!C:C,0)),MATCH('Raw Data'!C:C,'Raw Data'!C:C,0))0))

Is there something on here that anyone can see? I am still new at this
trying to learn. I did use the cntrl + shift + enter.

"Teethless mama" wrote:

=SUM(N(FREQUENCY(IF(rangeB="X911",MATCH(rangeA,ran geA,0)),MATCH(rangeA,rangeA,0))0))

ctrl+shift+enter, not just enter
the answer returns 4 not 3


"Amber" wrote:

My data contains 2 columns of data

I want to count column A if column B has not already been counted.
A B
1951 X911
2614 X911
2618 X911
2614 X911
1031 X911
2614 X911
2614 WAT
2614 WAT
2614 WAT
2614 WAT
2614 WAT

In other words, I want to see how many different lines of X911. The answer
I want is 3 because there are 3 different numbers associated with X911

HELP!!!!