Guided Notes

CTEs & Building Quality Measure Logic

Break complex logic into readable steps with common table expressions — denominator, exclusions and numerator — the way real quality measures are built and validated.

Common table expressions (CTEs)

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WITH step1 AS (...), step2 AS (SELECT ... FROM step1 ...) SELECT ... FROM step2; • Each step has a name and can use earlier steps. • Makes long logic readable, testable and reviewable. • You can SELECT * FROM any step while debugging. Most real healthcare queries are a chain of CTEs.

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