SQL Patterns Explained Through a UI Engineer's Lens

A JOIN is a prop being passed down and merged into a child’s local state. A GROUP BY is a reduce(). A window function is closer to a memoized derived value that still has access to its siblings — something like a selector that can see the whole list, not just the current row.

None of these mappings are perfectly precise, but they were enough to make SQL stop feeling foreign in my first few weeks of learning it seriously.

CTEs as component decomposition

A gnarly analytical query with five nested subqueries reads exactly like a monolithic component that needs to be broken into smaller ones. Common Table Expressions are the SQL equivalent of extracting a subcomponent — each one named, scoped, and readable on its own.

I’ll be expanding this into a full comparison table in a follow-up post.