# increment a number by amount of times a value exists in another column

#### spyrule

##### Board Regular
Hello,

I realize this will likely require an excel macro, but I'm not sure how to write this one...

I've got the following kind of data in one worksheet:

 SKU PARENT SKU OB1 PR1 OB1 FR3 OB1 X8 OB1 LT IT1 LT OI4 LT LK-4855 OB1 IT-9855

<tbody>
</tbody>

I would like to build a destination worksheet like :

 code SKU Linked_sku Position QTY CP OB1 0.00 CP OB1 PR1 1 0.00 CP OB1 FR3 2 0.00 CP OB1 X8 3 0.00 CP OB1 LK-4855 4 0.00 CP LT 0.00 CP LT IT1 1 0.00 CP LT OI4 2 0.00

<tbody>
</tbody>

Most of this content I have working, the only thing I cannot figure out how to do easily, is to populate the position column. I have several thousand rows, and no way to "group" by parent sku before creating the list, so I need some kind of either macro or formula to create an incremental value based on how many times the parent SKU is listed besides a SKU, and then show that sequence in the destination worksheet.

### Excel Facts

Round to nearest half hour?
Use =MROUND(A2,"0:30") to round to nearest half hour. Use =CEILING(A2,"0:30") to round to next half hour.

#### Jeffrey Mahoney

##### Well-known Member
Assuming your SKU column in the bottom table is column B. Put this formula in Cell D2 and copy down
=IF(AND(B2<>"",C2<>""),COUNTIFS(B\$2:B2,B2,C\$2:C2,"<>"),"")

Jeff

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