Top 27
Prep plan
Updated weekly · Last refresh Oct 17

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 daily.

27questions
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1
SQL & Data ManipulationStart here. 6 questions + 1 drill · ~63 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
SQL and Query ExperienceMedium

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

queriessql experienceHealth Catalyst
Join Patient Data SubsetMedium
Practice

Use three inner joins to return 2024 patients with diabetes or hypertension diagnoses.

data relationshipsJoinsData ModelingHealth Catalyst
Return Exactly Two RowsMedium
Practice

Aggregate completed encounters and return exactly two providers meeting count and billing thresholds.

SubqueriesGroup ByHavingHealth 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 Join Query WritingMedium
Practice
Practice drill

Combine patient and encounter records to calculate encounter counts, charges, and latest encounter dates.

null handlingJoinsGroup ByHealth CatalystCatalyst Labs

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2
Behavioral & Leadership21 questions · ~187 min
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
Cross-Functional Teamwork Under PressureEasy

Tests collaborative execution, communication, and ownership when working with multiple teammates under delivery pressure.

Stakeholder ManagementCommunicationLeadershipHealth Catalyst
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The finish line: interview-readyComplete all 27 questions plus 1 hands-on drill to finish this plan.