What level is it for?

Anyone who knows basic SELECT; it moves from WHERE/ORDER to JOIN and subqueries.

What format are answers?

Rows are separated by `;` and columns by `|`; “no result” means an empty set.

Where is progress stored?

Only in local localStorage, never uploaded; full backup/restore is available.

LEARNING GAME

SQL Queries: 1000 Gamified SELECT Practice Cards

Turn SQL queries into cards: read the query, predict the result, then reveal. Twenty cards per level unlock the next; it covers SELECT, WHERE, ORDER BY, JOIN, GROUP BY, HAVING and subqueries, ideal for ten minutes a day.

0Due today

0New cards

0Day streak

0Lv.1 · 0/100

Progress is stored locally in localStorage and is lost if you clear storage. Reviews use 1/3/7/14/30/60/120-day intervals.