Bank Account Summary
A medium-tier problem at 52% community acceptance, tagged with Database. Reported in interviews at Optum and 0 others.
Bank Account Summary is the kind of SQL problem that looks straightforward until you realize the data is messy. Optum has asked it. With a 52% acceptance rate, half the candidates who attempt it don't pass, which means the obvious JOIN won't cut it. The trick isn't complex, but miss it and you'll waste ten minutes debugging logic that feels right. If this problem hits your live assessment and you freeze on the data-cleaning angle, StealthCoder solves it in seconds, invisible to the proctor.
Companies that ask "Bank Account Summary"
Bank Account Summary 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 StealthCoderThis is a database aggregation problem disguised as a summary query. Most candidates jump to a JOIN and GROUP BY, but the real work is handling edge cases: null transactions, duplicate accounts, or transaction records that don't align cleanly with account states. The pattern is to aggregate transaction data correctly, then join to accounts only when necessary, and filter the result set carefully. Common failure point: grouping before you've cleaned the data, or joining in the wrong order and losing rows. When you're live and the first query returns wrong numbers, StealthCoder runs invisibly and surfaces the correct schema logic in real time.
Pattern tags
You know the problem.
Make sure you actually pass it.
Bank Account Summary 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.
Bank Account Summary interview FAQ
Is Bank Account Summary still asked at Optum in 2024?+
Yes. Optum has asked it. With a 52% pass rate, it's selective enough to differentiate candidates but not rare. You should assume database-focused roles will see it or something structurally similar.
What's the main trick everyone misses?+
Data alignment. Transactions and accounts don't always line up cleanly. You need to aggregate or filter transactions before joining to account metadata. Rushing the JOIN loses rows or produces duplicates. Slow down and build the subquery first.
How long should this take in a real assessment?+
If you know the pattern, 8-12 minutes. If you don't, you'll rewrite your query three times. The acceptance rate of 52% suggests it's not trivial. Plan 15 minutes to be safe.
Is this a pure SQL problem or does it involve application logic?+
Pure SQL. You're writing a single query or a small set of queries. No coding required. It tests your ability to reason about schema, aggregation, and joins under constraints.
Does Bank Account Summary come up in other companies' assessments?+
Not reported widely. Optum is the primary source in the data. That said, the pattern (aggregate transactions, summarize by account, handle null or missing data) is universal in backend and data engineering roles.
Want the actual problem statement? View "Bank Account Summary" on LeetCode →