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So, I basically have a lookup sheet that is ever-changing in which I have various IP Addresses that I list in a dropdown list box. Depending on the selection made, I want to automate the lookup for several other fields. When I just had 3 IP addresses, i was able to accomplish this task with the formula:

=IF(P4 = 'Lookup Values'!B3, 'Lookup Values'!D3, if(P4 ='Lookup Values'!B4, 'Lookup Values'!D4, if(P4 = 'Lookup Values'!B5, 'Lookup Values'!D5)))

This is far from elegant and was fine for just 3 items, however a pain in the rear to update as my Lookup Values list is now about 15 IP addresses (and growing). I'm sure there's a better way to do this or perhaps a function that allows me to quickly loop through the data, find a corresponding match and then fill in an associated field.

The logic is just if P4 has a value, then it should lookup to find which item in the B column and populate this cell with the corresponding number from the D column.

Any thoughts or guidance would be highly appreciated. My brain just isn't thinking clearly. I've seen a number of loops but most of those had math functions involved and not necessarily cell references.

1 Answer 1

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Some Approaches

VLOOKUP

=VLOOKUP(P4, 'Lookup Values'!B3:D, 3, 0)

FILTER

=FILTER('Lookup Values'!D3:D,
        'Lookup Values'!B3:B=P4) 

ARRAYFORMULA

=ARRAYFORMULA(
   IF('Lookup Values'!B3:B=P4,
      'Lookup Values'!D3:D,)) 

Function Support

ARRAYFORMULA  FILTER  VLOOKUP

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  • 1
    Thank you so much... 3 obvious answers are better than 1 as well. Time for me to go back and read the manual apparently. :)
    – 2Advanced
    Jan 20 at 6:24
  • @2Advanced My pleasure! I learnt so much on this site from other more experienced users Stick around learn, and then answer other people's questions who are starting on the same path. Be well!
    – Blindspots
    Jan 20 at 17:51

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