# Introducing YeSQL: Practical PostgreSQL, One Concept at a Time

DevFeed: [Introducing YeSQL: Practical PostgreSQL, One Concept at a Time](<https://devfeed.tech/articles/introducing-yesql-practical-postgresql-one-concept-at-a-time-34620.md>)

Original publisher: [Read original article](<https://tapoueh.org/blog/2026/08/introducing-yesql-practical-postgresql-one-concept-at-a-time/>)

Author: Dimitri Fontaine PostgreSQL Major Contributor; Author

Published: 2026-08-18T08:00:00Z

Content type: release

Language: en

Sources: [Dimitri Fontaine](<https://devfeed.tech/sources/dimitri-fontaine.md>)

Topics: [PostgreSQL](<https://devfeed.tech/topics/postgresql.md>), [SQL](<https://devfeed.tech/topics/sql.md>), [WebAssembly](<https://devfeed.tech/topics/web-assembly.md>)

Tags: [how-to](<https://devfeed.tech/tags/how-to.md>), [interactive](<https://devfeed.tech/tags/interactive.md>), [postgresql](<https://devfeed.tech/tags/postgresql.md>), [sql](<https://devfeed.tech/tags/sql.md>), [webassembly](<https://devfeed.tech/tags/webassembly.md>)

## AI overview

The article introduces YeSQL, a free collection of 24 short PostgreSQL lessons. Each lesson combines one concept with a runnable query and realistic data. Queries run locally in the browser through PGlite, PostgreSQL compiled to WebAssembly, without signup or a server round-trip.

## Source excerpt

I'm happy to share something new: YeSQL is live, a free set of 24 short PostgreSQL lessons -- one concept, one runnable query, real data, no signup. It's free to use today, and it's also a prototype for something I've wanted to build for a while: making every query in The Art of PostgreSQL runnable, right on the page.