Count unique lines

Chants

New Member

I have two columns; A=User id's and B=date.

I would like to know how many user id's in each month, but the user id's are not unique. How do i only count the unique user id's?

Excel Facts

Best way to learn Power Query?
Read M is for (Data) Monkey book by Ken Puls and Miguel Escobar. It is the complete guide to Power Query.

Jon von der Heyden

MrExcel MVP, Moderator
Hi

Welcome to the board! One of many options:

In C2 (assume you start from row 2 with labels above?):
=COUNTIF(\$A\$2:A2,A2)
copy and paste this down to end of range.

Then to determine how many unqiue ID's in a month:
=SUMPRODUCT(--(B1:B100>=#date#),--(B1:B100)<=#date#),--(C1:C100<2))

where #date# is iether the actual date types in, or linked to a cell if you prefer. This formula looks between dates so for one month date1 may be 01/01/06 and date2 will be 31/01/06.

If you want date specific then simply use --(B1:B100=#date#) and take out the other date conditions.

Hope this helps.

Jon

SteveO59L

Well-known Member
Try a pivot table

Chants

New Member
Perfect! Did the first option.

Thanks a mil Jon!

Replies
3
Views
130
Replies
7
Views
107
Replies
3
Views
213
Replies
9
Views
268
Replies
2
Views
188

1,141,429
Messages
5,706,402
Members
421,447
Latest member
arthuro2021

We've detected that you are using an adblocker.

We have a great community of people providing Excel help here, but the hosting costs are enormous. You can help keep this site running by allowing ads on MrExcel.com.

1)Click on the icon in the browser’s toolbar.
2)Click on the icon in the browser’s toolbar.
2)Click on the "Pause on this site" option.
Go back

1)Click on the icon in the browser’s toolbar.
2)Click on the toggle to disable it for "mrexcel.com".
Go back

Disable uBlock Origin

Follow these easy steps to disable uBlock Origin

1)Click on the icon in the browser’s toolbar.
2)Click on the "Power" button.
3)Click on the "Refresh" button.
Go back

Disable uBlock

Follow these easy steps to disable uBlock

1)Click on the icon in the browser’s toolbar.
2)Click on the "Power" button.
3)Click on the "Refresh" button.
Go back