Dataford
Interview QuestionsInterview GuidesExperiencesMock InterviewsPricing
Get started

7-Day Rolling Average Exports

MediumSQL · PostgreSQL00:00
Practice interviewer
In session
5 left
00:00

Your question is 7-Day Rolling Average Exports. Start with the requirements and the one table on the right.

Run and submit as often as you like. When you're ready, talk me through your approach or go straight to the code.

You need to log in / sign up to run or submit.

Problem

Adobe Acrobat product analytics wants to smooth daily export volume so the team can spot trends without day-to-day noise. Write a SQL query to calculate the 7-day rolling average of document exports per user.

Requirements

  1. Aggregate exports to one row per user per export date.
  2. Compute a 7-day rolling average of daily exports for each user using a window function.
  3. Include only dates where the rolling average can be calculated from the available history in the table.
  4. Return the result ordered by user and date.

Schema

acrobat_document_exports
ColumnTypeDescription
export_idPKINTPrimary key for each export event
user_idINTAdobe Acrobat user identifier
export_dateDATEDate the document was exported
document_idINTIdentifier of the exported document
export_formatVARCHAR(20)Export format such as PDF or DOCX
Tablesacrobat_document_exports
Your solutionPostgreSQL
You need to log in / sign up to run or submit.
Run a query to see results