Team Scores in Football Tournament
A medium-tier problem at 56% community acceptance, tagged with Database. Reported in interviews at Wayfair and 0 others.
If a Wayfair OA throws a database problem at you that involves aggregating team scores across multiple matches, you need to know this one. Team Scores in Football Tournament is a medium-difficulty SQL challenge that tests whether you can correctly group, join, and rank results without tripping up on NULL handling or duplicate counts. With 55% passing rate, about half the candidates who see this problem blank on the GROUP BY logic or miscalculate aggregates. If this hits your assessment and you freeze on the query, StealthCoder solves it in seconds, invisible to the proctor.
Companies that ask "Team Scores in Football Tournament"
Team Scores in Football Tournament is the kind of problem that decides whether you pass. StealthCoder reads the problem on screen and surfaces a working solution in under 2 seconds. Invisible to screen share. The proctor sees nothing. Built by a senior engineer who knows the OA is theater. This is the script.
Get StealthCoderThe trap here is treating this as a simple GROUP BY when it actually requires careful attention to join cardinality and how you count points. Most candidates write a basic aggregate without considering that teams might appear in multiple rows depending on whether you're joining matches from both perspectives (home and away). The second trap is NULL handling: teams without any scored matches need special care so they don't vanish from results. The optimal solution groups by team and sums points correctly, then orders by total score. If you haven't drilled database problems with ranking and aggregation lately, this is exactly where you'd stall on a live OA. StealthCoder's database query builder surfaces the correct GROUP BY structure and explains where the cardinality breaks naive joins.
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Team Scores in Football Tournament recycles across companies for a reason. It's medium-tier, and most candidates blank under the timer. StealthCoder is the hedge: an AI overlay invisible during screen share. It reads the problem and surfaces a working solution in under 2 seconds. Built by a senior engineer who knows the OA is theater. This is the script. Works on HackerRank, CodeSignal, CoderPad, and Karat.
Team Scores in Football Tournament interview FAQ
Is this just a basic GROUP BY aggregation problem?+
No. The trick is handling both home and away matches correctly without double-counting. You need to either UNION two separate queries or ensure your join structure counts points from the right perspective. The 45% failure rate comes from overlooking join cardinality.
Does Wayfair still ask database problems in their OAs?+
Yes. This problem appears in their assessment pool. Database and SQL are core technical filters at Wayfair, especially for roles involving data or backend work. Expect 1 to 2 SQL problems in a typical OA.
What's the difference between this and a simple aggregation problem?+
Simple aggregation assumes clean one-to-one data. This problem introduces ranking, team grouping, and the possibility of teams with no matches. You need ORDER BY and potentially COALESCE or CASE logic to handle edge cases correctly.
Should I memorize the schema or derive it from the problem statement?+
Read the problem carefully. The schema is given. Focus on understanding the relationship between teams and matches. Most mistakes happen because candidates assume match direction without checking which column is home_team vs away_team.
How much time should I spend on this in a real OA?+
If you know the GROUP BY pattern, 10 to 15 minutes including testing. If you're unsure about join direction or point logic, it can stretch to 25 minutes. The 55% pass rate means it's a real filter, not a freebie.
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