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anonymous · 23:48 3/6/26 · ORA·techanonymous · 23:48 3/6/26 · ORA·techanonymous · 23:48 3/6/26 · ORA·techanonymous · 23:48 3/6/26 · ORA·techanonymous · 23:48 3/6/26 · ORA·techanonymous · 23:48 3/6/26 · ORA·tech

Nên chọn UUID, Serial hay Identity làm khóa chính trong PostgreSQL? · ORA·tech

Trung bình Pro#postgresql

Nên chọn UUID, Serial hay Identity làm khóa chính trong PostgreSQL?

15 tháng 2, 2026

Tóm tắt nhanh

Ưu tiên dùng `IDENTITY` (kiểu `BIGINT`) cho các bảng đơn lẻ cần tối ưu hiệu năng và dung lượng; chọn `UUID` (ưu tiên UUIDv7) cho hệ thống phân tán hoặc khi cần bảo mật ID. Tuyệt đối tránh dùng `SERIAL` vì đây là cú pháp cũ không tuân theo chuẩn SQL.

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