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Rolling 7-Day Cohort Session Average
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Rolling 7-Day Cohort Session Average

MediumSQL · PostgreSQL

Problem

Write a query to calculate the rolling 7-day average of physical therapy sessions completed by users, partitioned by their clinical cohort at Hinge health.

Use completed sessions only. Include calendar dates with zero sessions, beginning with the earliest completed session date and ending with the latest.

Output

  1. One row per clinical cohort and calendar date.
  2. Columns: clinical_cohort, activity_date, daily_sessions, and rolling_7_day_avg.
  3. Sort by clinical_cohort, then activity_date ascending.

Schema

users
ColumnTypeDescription
user_idPKINTUnique user identifier
clinical_cohortVARCHAR(30)Clinical cohort assigned to the user
therapy_sessions
ColumnTypeDescription
session_idPKINTUnique therapy session identifier
user_idINTUser who attended or was scheduled for the session
session_dateDATEDate associated with the therapy session
statusVARCHAR(20)Session status, such as completed or scheduled
Tablesuserstherapy_sessions
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Your question is Rolling 7-Day Cohort Session Average. Start with the requirements and the two tables in the Question tab.

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