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Compute Search to Appointment Conversion
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Compute Search to Appointment Conversion

MediumSQL · PostgreSQL

Problem

Given a table of search queries and a table of bookings, write a query to identify the conversion rate of searches to confirmed appointments by specialty for Zocdoc.

Use all search queries in the provided data. A search is converted when it has at least one confirmed booking. Return percentages rounded to two decimal places.

Output

  1. One row per specialty, including specialties with no confirmed appointments.
  2. Columns: specialty, search_count, confirmed_search_count, and conversion_rate_pct.
  3. Sort by conversion rate descending, then specialty ascending, with NULL specialties last.

Schema

search_queries
ColumnTypeDescription
search_query_idPKINTUnique identifier for a Zocdoc search query
specialtyVARCHAR(100)Medical specialty selected for the search
searched_atTIMESTAMPTimestamp when the search occurred
bookings
ColumnTypeDescription
booking_idPKINTUnique identifier for a booking
search_query_idINTSearch that led to the booking, when available
booking_statusVARCHAR(30)Booking status, such as confirmed, pending, or cancelled
booked_atTIMESTAMPTimestamp when the booking was created
Tablessearch_queriesbookings
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