Here is a question someone asked me in a class recently.
I know how to use VLOOKUP to find a value based on search term. But I have a slight variation to it. I need to extract value below the cell VLOOKUP finds.
This is simpler than it sounds.
We can use INDEX + MATCH formulas to do this.
The syntax is like below:
=INDEX( value column, MATCH (search what, search column, 0) + 1 )
Why it works?
MATCH formula finds the position of what you are searching. By adding 1 to it and extracting the corresponding “values column”, we can get VLOOKUP + 1 value.
Homework for you
If you think finding VLOOKUP+1 is easy then I have a challenge for you.
Find the last match. Lets say in a table you have multiple items matching lookup value. How would you find the last item. Assume what you are finding is in A1, list is in C1:D20 and we want the value in 2nd column.
Go ahead and post your answers in comments section.
2 Responses to “Top 10 Power BI Interview Questions & Answers”
Hello...
In Power BI I have data that includes months by name only (e.g. May, April, December...)
I need to build charts etc. but i need the months to go chronologically... not alphabetically... I cannot seem to find the fix to this.... once again, my data does NOT have an actual date attached to it (like 02/01/2023)....only month names... can i use a helper table wher i id the month names as numbers 1 thru 12? and if so, how do i manage this to work for me ?
Thank you.
~Keith
You need to setup an extra table to map each month name to a running number. A simple 12 row table like
Jan 1
Feb 2
Mar 3
..
Dec 12
Then create a relationship between this month table and your month column
Now, go to "table view" in Power BI and set the sort by column to month number for the month name column on this new table.
Finally, use the new table's month name whenever you need to refer to the month name in the visuals.
They will be chronologically arranged.