Grep pattern Matching Doesn't work?

Solution 1:

Quotes are characters too - your files doesn't contain May,25, it contains "May",25. So

grep '"May",25' "$1"

grep "\"May\",25" "$1"

(but not grep "\"May\" ,25" "$1" - spaces are characters as well).

Or you can use a CSV aware tool that understands CSV quoting:

mlr --csv filter 'Month == "May" && Day == 25'

csvgrep -c Month -m May "$1" | csvgrep -c Day -m 25