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Join Queries for Missing Listings
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Join Queries for Missing Listings

MediumSQL · PostgreSQL

Problem

Write a SQL query using an INNER JOIN and a LEFT JOIN to find properties that have no active listings. Use the properties, markets, and listings tables. Only listings with a status of active should count.

Output

  1. One row per qualifying property with property_id, property_name, and market_name
  2. Include properties with no active listings and exclude properties with at least one active listing
  3. Order by property_id ascending

Schema

properties
ColumnTypeDescription
property_idPKINTUnique property identifier
property_nameVARCHAR(150)Display name of the property
market_idINTReference to the property's market
markets
ColumnTypeDescription
market_idPKINTUnique market identifier
market_nameVARCHAR(100)Market name
listings
ColumnTypeDescription
listing_idPKINTUnique listing identifier
property_idINTReference to the listed property
statusVARCHAR(30)Current listing status
listing_typeVARCHAR(30)Type of property listing
Tablespropertiesmarketslistings
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