join the nosql movement relational database approach comment table reader table article table author name author table document store approach "articles""title""title of the article""articleid" "body""body of the article""author""isaac asimov""comments""username""fritz"join date"""commentid" "body""this is great article""replies""username""freddy""join date""""commentid" "body""seriouslyit' rubbish}"username""stark""join date""""commentid" "body"" don' agree with the conclusionfigure document stores save documents as wholewhereas an rdms cuts up the article and saves it in several tables the example was taken from the guardian website