So today I needed to filter a fairly giant csv file down to only the rows that contained certain values in either one or the other column. I wanted only the rows where “PL” was in the country column, OR the email address column had a value that ended with “.pl”. So I made this little function in the last cell of each row : =OR(COUNTIF(K2,"PL"),COUNTIF(L2,"*.pl")) Then I filtered the new column that contained either TRUE or FALSE, by all the rows that were TRUE.