Difference Between Record Label and Record Company?

For example say if a singer is signed to Columbia Records which is owned by Sony Music, which is a record company, which one do they release their records through Columbia or Sony? Also on itunes or amazon I always see this sort of thing when purchasing a mp3 "Universal Motown Records, a division of UMG... show more For example say if a singer is signed to Columbia Records which is owned by Sony Music, which is a record company, which one do they release their records through Columbia or Sony?

Also on itunes or amazon I always see this sort of thing when purchasing a mp3 "Universal Motown Records, a division of UMG Recordings, Inc." or "2012 Simco Limited under exclusive license to Sony Music Entertainment UK Limited" what does this mean?
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