Find if value in column A contains value from column B?

Question

I have two columns- column E which extends upto 99504(values) and column I which extends to 2691(values).Both the columns contains filenames with extension.

Something li

Answer 1

You can use VLOOKUP, but this requires a wrapper function to return True or False. Not to mention it is (relatively) slow. Use COUNTIF or MATCH instead.

Fill down this formula in column K next to the existing values in column I (from I1 to I2691):

=COUNTIF(,)>0
=COUNTIF($E$1:$E$99504,$I1)>0

You can also use MATCH:

=NOT(ISNA(MATCH(,)))
=NOT(ISNA(MATCH($I1,$E$1:$E$99504,0)))