『https://dl.acm.org/citation.cfm?id=16301.16303&dl=GUIDE&dl=ACM&idx=J689&part=periodical&WantType=periodical&title=ACM%20SIGMOD%20Record』へのコメント

Codd 先生による NULL の解説．

oanus のブックマーク 2008/07/29 09:08

<blockquote class="hatena-bookmark-comment"><a class="comment-info" href="https://b.hatena.ne.jp/entry/9466635/comment/oanus" data-user-id="oanus" data-entry-url="https://b.hatena.ne.jp/entry/s/dl.acm.org/citation.cfm?id=16301.16303&dl=GUIDE&dl=ACM&idx=J689&part=periodical&WantType=periodical&title=ACM%20SIGMOD%20Record" data-original-href="https://dl.acm.org/citation.cfm?id=16301.16303&dl=GUIDE&dl=ACM&idx=J689&part=periodical&WantType=periodical&title=ACM%20SIGMOD%20Record" data-entry-favicon="https://cdn-ak2.favicon.st-hatena.com/64?url=https%3A%2F%2Fdl.acm.org%2Fcitation.cfm%3Fid%3D16301.16303%26dl%3DGUIDE%26dl%3DACM%26idx%3DJ689%26part%3Dperiodical%26WantType%3Dperiodical%26title%3DACM%2520SIGMOD%2520Record" data-user-icon="/users/oanus/profile.png">https://dl.acm.org/citation.cfm?id=16301.16303&dl=GUIDE&dl=ACM&idx=J689&part=periodical&WantType=periodical&title=ACM%20SIGMOD%20Record</a><ul class="comment-tag" style="list-style: none; margin: 0px;"><li style="float: left">[<a href="https://b.hatena.ne.jp/q/relational_algebra">relational_algebra</a>]</li><li style="float: left">[<a href="https://b.hatena.ne.jp/q/missing_data">missing_data</a>]</li></ul><br><p style="clear: left"> Codd 先生による NULL の解説．</p><a class="datetime" href="https://b.hatena.ne.jp/oanus/20080729#bookmark-9466635"><span class="datetime-body">2008/07/29 09:08</span></a></blockquote><script src="https://b.st-hatena.com/js/comment-widget.js" charset="utf-8" async></script>

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