November 2019
Intermediate to advanced
256 pages
3h 6m
Japanese
Content preview from 初めてのGraphQL ―Webサービスを作って学ぶ新世代APIBecome an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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.
3章GraphQLの問い合わせ言語
GraphQLが公開される45年前、当時IBMの社員だったエドガー・F・コッドは「A Relational Model of Data for Large Shared Databanks（大規模共有データバンクのデータ関係モデル）」（http://bit.ly/2Ms7jxn）という短い論文を発表しました（タイトルは長いですね）。この論文は、ある非常に有用な考え方について述べています。データを表（テーブル）の形で保存し、操作するという考え方です。この論文の発表から間もなく、IBMはリレーショナルデータベースを開発しました。そして、データベースを操作するためのクエリ言語として、SEQUEL（Structured English Query Language）が誕生しました。今ではSQLとしてよく知られている言語の原型となったものです。
SQL（Structured Query Language）はデータベースに格納されているデータにアクセスしたり、管理したり、操作したりするのに利用するドメイン固有言語です。SQLによって、私たちは単一のコマンドで多数のデータにアクセスできるようになりました。また、IDだけではなく任意の項目をキーとして使い、欲しいデータにアクセスすることもできます。
SQLで使えるコマンドは非常に簡素で、SELECT、INSERT、UPDATE、DELETEの4つです。SQLを使ってできることはこれだけです。データベース上の複数のテーブルにまたがったデータであっても、単一のSQLコマンドで取得できます。
データに対してSELECT、INSERT、UPDATE、DELETEの4つの操作のみを行うという考え方は、Representational ...
Become an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
and much more.
Read now
Unlock full access
More than 5,000 organizations count on O’Reilly
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.