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Updated weekly · Last refresh Aug 30

Health Catalyst Data Analyst Interview Questions

The questions to prepare for a Health Catalyst Data Analyst interview. Questions from real interview reports rank first. Updated weekly.

27questions
~4htotal time
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1
SQL & Data ManipulationStart here. 4 questions + 3 drills · ~62 min
NULL Handling in AggregationsMedium

Tests your ability to write correct SQL with NULL semantics and document assumptions for healthcare data.

null handlingdata integrityAggregationsHealth Catalyst
Window Function vs Group ByMedium

Tests your understanding of SQL patterns for selecting latest records and when to use each approach.

Window FunctionsRankingGroup ByHealth Catalyst
Design ERD for Employee HistoryHard

Tests your ability to model temporal HR data with correct relationships and history tracking.

dimensionsData ModelingHealth Catalyst
SQL and Query ExperienceMedium

Evaluates practical SQL knowledge and ability to work with data through queries.

queriessql experienceHealth Catalyst
Top Customers by Sales RevenueEasy
Practice
Practice drill

Use GROUP BY and SUM to rank the top 10 customers by total revenue from a single sales table.

RankingGroup ByAggregationsHousecall ProEquifaxXYZ
SQL Join With Matching and Non-MatchingMedium
Practice
Practice drill

Use a FULL OUTER JOIN and CASE expression to identify matched and unmatched OneTrust QA test cases and executions.

JoinsData WranglingCase WhenHealth CatalystGoodwill Industries Of TulsaOneTrust
SQL Joins Across TablesMedium
Practice
Practice drill

Join Health Catalyst care gap data with patient and outreach records to prioritize active patients needing follow-up.

SubqueriesJoinsData WranglingNumeratorHealth CatalystCelebal Technologies

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2
Behavioral & Leadership23 questions · ~184 min
Aligning Competing Stakeholder PrioritiesMedium

Tests stakeholder management under pressure, especially prioritization, influence without authority, and clear communication.

Stakeholder ManagementCommunicationDealing With AmbiguityHealth Catalyst
Using SQL to Solve Data ProblemsEasy

Tests how you communicate hands-on SQL experience through a concrete example, including ownership, validation, and business impact.

technical backgrounddata engineeringsql experienceHealth Catalyst
Prioritizing Across Competing Client ProjectsEasy

Tests prioritization under pressure across multiple projects, including trade-off judgment, stakeholder communication, and ownership of outcomes.

OwnershipPrioritizationHealth Catalyst
Learning a New Tool FastEasy

Tests learning agility under delivery pressure, with emphasis on ownership, prioritization, and adapting quickly to unfamiliar technical work.

learning agilityinitiativeadaptabilityHealth Catalyst
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The finish line: interview-readyComplete all 27 questions plus 3 hands-on drills to finish this plan.