SQLã®é”人ã¸ã®é“: MySQLã§ã®é«˜é€Ÿãƒ»åŠ¹çŽ‡çš„クエリ作æˆè¡“ - Qiitaデータベースã¨ãƒ†ãƒ¼ãƒ–ルã®ä½œæˆ テスト用ã®ãƒ‡ãƒ¼ã‚¿ãƒ™ãƒ¼ã‚¹testdbを作æˆã—ã€ãƒ‘フォーマンスãƒãƒ¥ãƒ¼ãƒ‹ãƒ³ã‚°ã‚’検証ã™ã‚‹ãŸã‚ã®companyãŠã‚ˆã³personテーブルを定義ã—ã¾ã™ã€‚ CREATE DATABASE testdb; USE testdb; CREATE TABLE company ( company_id INT AUTO_INCREMENT PRIMARY KEY, company_name VARCHAR(255) NOT NULL, created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP ); CREATE TABLE person ( person_id INT AUTO_INCREMENT PRIMARY KEY, company_id INT, person_name VARCHAR(255) NOT NULL, email VARCH
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