SQL Subqueries vs CTEs: What I Wish Someone Told Me When I Was Learning SQL

When you first start learning SQL, everything feels simple. You write basic SELECT queries, maybe add a WHERE , and life is good. Then suddenly you meet things like subqueries and CTEs , and it feels like SQL switched languages overnight. I remember staring at nested queries thinking, “Why would anyone write a query inside another query?” Turns out… there’s a reason. And once it clicks, it actually makes SQL a lot more powerful and clean. Let’s break it down in a simple way. Subqueries (a query