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SQL for Last Lead by Date
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SQL for Last Lead by Date

EasySQL · PostgreSQL

Problem

Realtor wants to show each agent's most recent lead generated through Realtor surfaces such as the listing portal, referrals, or email campaigns. Write a PostgreSQL query that returns the latest dated lead for every agent.

Requirements

  1. Return every agent, including agents with no valid dated leads.
  2. Select the lead with the greatest generated_at for each agent.
  3. Break timestamp ties deterministically by selecting the greatest lead_id.
  4. Order the final results by agent_id.

Schema

agents
ColumnTypeDescription
agent_idPKINTUnique Realtor agent identifier
agent_nameVARCHAR(100)Agent display name
marketVARCHAR(80)Agent's primary real estate market
leads
ColumnTypeDescription
lead_idPKINTUnique lead identifier
agent_idINTAssigned agent identifier
generated_atTIMESTAMPTimestamp when the lead was generated
sourceVARCHAR(40)Realtor lead acquisition source
statusVARCHAR(20)Current lead status
Tablesagentsleads
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Your question is SQL for Last Lead by Date. Start with the requirements and the two tables in the Question tab.

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