In summary, primary keys uniquely identify rows in a table. You can create a primary key in a cou...

UUID as Primary Key. 22 March 2014. 最近有個小小專案，該專案用PostgreSQL，該案按照我們新專案的慣例，採用UUID 當做主鍵，而不是用資料庫自動產生的...

A primary key is, by definition unique within its scope. It is, therefore, an obvious thing to us...

What I always do, even if it's redundant is I create primary key ... CREATE TABLE users( pk INT N...

What is UUID? UUIDs stands for Universally Unique Identifiers, used to uniquely identify the tabl...

With uuid as a primary key, it could have been generated on the client side (the app), so that th...