الاحتفاظ بالبيانات والأرشفة

في هذا الدرس

plan how long data stays and where it goes.

الموضوعات المخطط لها

• Decide retention per table from business and legal needs (orders for years, sessions for days).
• Partitions make it cheap: DETACH PARTITION, archive to cheaper storage or a file, then drop.
• Large DELETEs create bloat and long locks; avoid them for retention.
• Test restoring archived data; archived but unreadable data is lost data.
• Personal data may require deletion on request (privacy rules); plan for both.