データベース設計の「真の終着点」——第5正規形(5NF)でデータ不整合の連鎖を断つ (English)
The “True Destination” of Database Design — Breaking the Chain of Data Inconsistency with Fifth Normal Form (5NF) “Database design is sufficient up to the Third Normal Form (3NF).” This long-standing adage in the development community can often become a precarious compromise in the face of today’s complex business logic. In an era where data serves as a business compass, deficiencies in schema design can trigger “Silent Anomalies” that undermine the reliability of the entire system. ...