SELECT empno, ename, job, sal, deptno FROM emp ORDER BY CASE WHEN deptno=10 THEN 1 WHEN deptno=20 THEN 2 ELSE 3 END, sal DESC; 注意点: ビジネス優先度 → 数値化 → 追加キー の順で安定ソート。 → 完全版(ブログ):「ORDER BYでのCASE式を使ったカスタマイズ ...
A MySQL database project demonstrating the use of the ORDER BY clause . The project sorts student records by different fields such as marks, age, and names. This project creates a student database ...