awk - Match two columns and put them in one file

Question

I have two files. In each file I have two columns. I need to match the first value of column two of file1 with each value from column two of file2. If they are equal I need to put the two columns (column one from file1 and file2) in one file, but they should be adjacent to each other. If the two values do not match, do nothing.

file1

344  0
465  1
729  2
777  3
676  4
862  5

file2

766  0
937  1
980  2
837  3
936  5

Example output:

344    766
465    937
729    980
777    837
862    936

Answer 1

If you insist this be done in awk

awk 'NR == FNR {arr[$2] = $1; next} {if ($2 in arr){print(arr[$2], $1)}}' file1 file2