You can edit the table by "Edit Query" Option. Find the Add Index Column in the "Add Column" Tab. You can see now the new column is added at the last. Customize the column to rename it as "SNO" or "ROW NUM" or anything preferred.
Note: You can add from 0 or from 1.
You have a Row Number or Serial Number Column Ready.
I came across this post and it is what i need. However when I create the index column .. when I bring it into a table in BI, the number become a series of other numbers and not my 1, 2, 3, index that was created. I have seen several places where they show you how to create the index column, but How do i use it in my BI Table????