今天聊點不一樣的東西，有點不起眼卻很重要的小玩意：UUID (或是微軟的GUID)。 ... 有順序的UUID 除了排序時方便，在當作MySQL 的主鍵(primary key)， ... 閒...

The clustered index orders the rows automatically by the primary key. When you insert a new row w...

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...

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

By using UUID, you can generate the primary key value of the parent table up front and insert row...

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