eq { diff { hop { filter_eq { all_rows ; name ; 9 ad } ; power } ; hop { filter_eq { all_rows ; name ; 9 adb } ; power } } ; -200 } = true
select the rows whose name record fuzzily matches to 9 ad . take the power record of this row . select the rows whose name record fuzzily matches to 9 adb . take the power record of this row . the second record is 200 larger than the first record .