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Employee Query With Unmatched IDs
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Employee Query With Unmatched IDs

EasySQL · PostgreSQL

Problem

Cimpress Technology needs an employee-project view for internal staffing. Write a PostgreSQL query that returns every employee from empdetails, including employees who have no matching project in projdetails.

Requirements

  1. Use a LEFT JOIN from empdetails to projdetails using employee_id.
  2. Return the employee name, employee first name, project ID, project name, and project first name.
  3. Preserve employees without projects by returning NULL for project columns.
  4. Order by firstname from empdetails, then firstname from projdetails, placing NULL values last in both sort levels.

Schema

empdetails
ColumnTypeDescription
employee_idPKINTEGERUnique employee identifier
empnameVARCHAR(100)Employee's full name
firstnameVARCHAR(50)Employee's first name
projdetails
ColumnTypeDescription
project_idPKINTEGERUnique project identifier
employee_idINTEGERAssigned employee identifier
project_nameVARCHAR(150)Name of the project
firstnameVARCHAR(50)Project contact or team first name
Tablesempdetailsprojdetails
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