How to Fix Error - counting values that only appears once?

counting values that only appears once

Hi
 
I need to count the unique values in a column.
So in the exampel below I would like to get the answer 2.
Because 100007 and 100006 only appears once.
 
Any ideas?
 
Example:
 
      A

100002

100002

100007

100006

Keys to the Problem counting values that only appears once

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Hi,
 
Try this.
 
 
=SUM(IF(FREQUENCY(A1:A100,A1:A100)=1,1))

Check Windows System Requirements

This error can be due to some configuration requirements for you system. If your PC hardware is not up to par, then make sure you upgrade where necessary before continuing:

Microsoft Windows Requirements :

• 1 gigahertz (GHz) or faster 32-bit (x86) or 64-bit (x64) processor
• 16 GB available hard disk space (32-bit) or 20 GB (64-bit)

Another Safe way to Repair the Problem: counting values that only appears once:

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