Relational Database System (RDBMS) 運作的方式

在「How does a relational database work」這篇文章用了很長的篇幅講「資料庫如何把 SQL query 轉換為實際的操作」:

I’ll focus on what I think is essential: the way a database handles an SQL query.

資料庫也是人寫出來的,資料結構與演算法也是人設計出來的。你現在手上有資料,要怎麼把 SQL query 變成有效率的查詢操作行為,就是這篇文章在描述的。

看起來連 JOIN 的機制也講了不少...

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