MySQLの外部キー制約RESTRICT,CASCADE,SET NULL,NO ACTIONの違いは？ - QiitaDeleted articles cannot be recovered. Draft of this article would be also deleted. Are you sure you want to delete this article?
Protect Your Data with PostgreSQL Constraints
Posted on: 2016-01-08 What should validate your data - your application code, or your database? If you said "both", your answer is correct and you are entitled to feel smug for 1.5 seconds. And... stop. While application code can generally produce friendlier user errors, only the database knows what data it has right now - even if the application code ran a SELECT a few milliseconds ago, there may
1
リリース、障害情報などのサービスのお知らせ
最新の人気エントリーの配信
処理を実行中です
j次のブックマーク
k前のブックマーク
lあとで読む
eコメント一覧を開く
oページを開く
Z3 Constraint Solver library for Ruby
Ruby Quiz - Constraint Processing (#70)
http://www.minituku.net/drills/22902467/questions/785609361/result?choice=22072085&locale=en
Object#freezeについて - Qiita
)
Constraint (mathematics) - Wikipedia
