How to index column on multiple values

Hi , Anonymous 

According to your description, you want to "add an index that will index by the Requireddate and PO Number itemcode".

For your data , in the [RequiredDate] has the same date , if in the normal rankx logic,it will returns 1 :

If this meet your need , you just need to click "New Column" and enter this:

Column = RANKX( FILTER('Table','Table'[PurchaseOrderNo]=EARLIER('Table'[PurchaseOrderNo]) && 'Table'[ItemCode] = EARLIER('Table'[ItemCode])) , [RequiredDate] ,,ASC,Dense)

If you need to judge the row number for your data , you need to add an index column in Power Query Editor:

Then you can click "New Column" and enter:

Column 2 = RANKX( FILTER('Table','Table'[PurchaseOrderNo]=EARLIER('Table'[PurchaseOrderNo]) && 'Table'[ItemCode] = EARLIER('Table'[ItemCode])) , [RequiredDate]+[Index] ,,ASC,Dense)

Then we can get the result:

Thank you for your time and sharing, and thank you for your support and understanding of PowerBI! 

Best Regards,

Aniya Zhang

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