The Number of Users That Are Eligible for Discount
A easy-tier problem at 51% community acceptance, tagged with Database. Reported in interviews at Analytics quotient and 0 others.
You're staring at a SQL problem that looks simple until you write the WHERE clause and realize you've either over-filtered or under-filtered your result set. The Number of Users That Are Eligible for Discount is an easy-rated database problem with a 50% acceptance rate, which means half the candidates who attempt it get it wrong. Analytics quotient has asked this one. The catch isn't the SQL syntax, it's understanding exactly which condition qualifies a user and writing it without logic errors. If you hit this in a live assessment and blank on the eligibility rule, StealthCoder solves it in seconds while the proctor sees nothing.
Companies that ask "The Number of Users That Are Eligible for Discount"
The Number of Users That Are Eligible for Discount 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 an Amazon engineer who realized the OA tests how well you memorized 200 problems, not how well you code.
Get StealthCoderThis is a filtering problem disguised as an easy one. You'll typically need to read a users or transactions table, apply one or more conditions (purchase amount, account age, registration date, customer status), count or list those who meet the criteria, and return the result. The gotcha: candidates often misread the eligibility threshold, apply AND when they should apply OR, or forget to handle NULL values. The obvious first draft usually fails because the condition is slightly more nuanced than it appears in the problem statement. You need to parse the exact wording, translate it to a WHERE clause without introducing off-by-one errors, and verify your result set makes sense. StealthCoder is the safety net if you second-guess yourself during the live OA and need a working solution fast.
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Make sure you actually pass it.
The Number of Users That Are Eligible for Discount recycles across companies for a reason. It's easy-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 an Amazon engineer who realized the OA tests how well you memorized 200 problems, not how well you code. Works on HackerRank, CodeSignal, CoderPad, and Karat.
The Number of Users That Are Eligible for Discount interview FAQ
Why is the acceptance rate only 50% if this is marked easy?+
The difficulty rating reflects algorithmic complexity, not clarity. The real barrier here is reading precision. Candidates misinterpret the eligibility rule, apply the wrong logical operator, or forget edge cases like inactive users or NULL fields. The SQL itself is trivial; the logic trap is not.
Is this still asked at companies that use online assessments?+
Yes. Analytics quotient has asked it. Database filtering problems appear regularly in screening rounds because they're fast to grade and reveal whether a candidate can read a spec and translate it accurately into a query without logic errors.
What's the most common mistake on this problem?+
Misreading the boundary condition. Candidates write >= when the rule says >, or they count users instead of listing them, or they forget to exclude already-discounted users. Re-read the eligibility rule three times before you submit.
Do I need a JOIN for this, or is it just a single table query?+
The input data isn't specified, so it depends on the actual schema. Prepare for both. If you need user data and discount history, you may need an INNER or LEFT JOIN. If it's all in one table, keep it simple. The grader won't care about query elegance if the result is correct.
How much time should I spend on this in a live OA?+
Since it's easy-rated and 50% pass it, aim to solve it in 5 to 10 minutes. If you're over 15 minutes, stop, write what you have, and move on. Don't let one query block the whole assessment. That's when StealthCoder becomes your lifeline.
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