Multiplayer Speedrun Duels

SQL Battle Arena

Race against elite developer ghosts under competitive ticking clocks. Win XP and climb ELO ratings!

ARENA ELO RATING

1240 🏆

Select Your Speedrun Duel

shopmart+300 XP

Find all users who have never placed an order. Return their name using LEFT JOIN and WHERE order id IS NULL.

staffcorp+500 XP

Select first_name and salary of employees earning more than the company average. Use a subquery.

retail_pos_enterprise+750 XP

Calculate the total summation of vat_amount across all recorded invoices.