Charts for Singles/Hit SongsSingles/Hit Songs: Various song charts are referenced throughout the DMDB. Here are what the codes mean:

If a song is followed by --, then it was a non-charting single or was never released as a single, but has become a classic nonetheless.In addition, American radio airplay and worldwide sales figures are noted, in millions (ex: sales: 0.5 m, air: 0.4 m). See DMDB Links page under “Sales” and “Airplay” categories for sources.