Add sequence number for a calculated table

[Winniethewinner]

Hello everyone, 

I have a calculated table which retrieves the month values from my fact table. How can I add a column with sequence number 1,2,3,4,5,6....? Thank you.  

[vapid128 · Accepted solution]

rankx(Month_Orders,[month],,ASC)

[Winniethewinner]

Thanks @vapid128 , works perfect!