注目コメント算出アルゴリズムの一部にLINEヤフー株式会社の「建設的コメント順位付けモデルAPI」を使用しています
This document discusses database modeling for a system with companies, departments, and employees... This document discusses database modeling for a system with companies, departments, and employees. It describes setting up composite primary keys to link the three tables together and using associations and joins to efficiently query across the tables. Methods are defined on the Company model to count employees. A view is created to select large companies with over 1000 employees.Read less
2011/09/14 リンク