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Rank Top Agents by Conversion
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Rank Top Agents by Conversion

MediumSQL · PostgreSQL

Problem

Write a query to rank top-performing agents based on conversion rates using dense rank window functions.

Use the provided agent and application data. Calculate each agent's conversion rate as converted applications divided by total applications.

Output

  1. One row per agent, including agents with no applications
  2. Columns: agent_id, agent_name, total_applications, converted_applications, conversion_rate_pct, and conversion_rank
  3. Sort by conversion_rank ascending, conversion_rate_pct descending, and agent_id ascending

Schema

agents
ColumnTypeDescription
agent_idPKINTUnique agent identifier
agent_nameVARCHAR(100)Agent full name
emailVARCHAR(150)Agent email address
applications
ColumnTypeDescription
application_idPKINTUnique application identifier
agent_idINTAgent assigned to the application
statusVARCHAR(30)Current application status
Tablesagentsapplications
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