May 2019
Beginner to intermediate
296 pages
6h 58m
Japanese
Content preview from IT用語図鑑 ビジネスで使える厳選キーワード256
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.
260
関連用語
人物に関連する話
偉人のここがスゴイ！
エドガ ー・
F
・コ ッド
関係モデルを発明
1923 年イギリス出身。IBM 社にてデータを扱う際の関係モデルや関係代数、リレーショ
ナ ル デ ータ ベ ース を 発 明し 、「 R D B M S の 父 」とも言 わ れ る。コッド 博 士 の 理 論 を 基 に 、 現
在 の 多くの データベ ース で 使 わ れ ている S Q L が 開 発 され ている。デ ータの 管 理 に 関 わる
貢 献をした人 に対してはコッド革 新 賞が 毎 年 授 与され ている。
扱いづらかったデータベースに革命を起こした！
関係モデルと関係代数
データを2次元の表形式で表現す
る方法を関係モデルと言う。表で
扱う和・差・積などの集合演算や、
結合・射影・選択などの関係演算
の定義を関係代数と言う。
コッドの12の規則
関係データベース管理システム
が持つべき特徴を記した規則に
「コッドの12の規則」があるが、
1990年に規則の数が18個に拡張
されている。
正規化への貢献
データベースの正規化について、
第1〜第3正規形を定義しただけ
でなく、第3正規形の強化版とし
て定義された正規化の方法にボ
イス・コッド正規系がある。
Keyword
233
▶
えど が ー ・ ふ ら んく・ こっど
表計算ソフトとDBMS
……P86
リレーショナルデータベースとSQL
……P248
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.