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Top Projects by Resource Utilization
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Top Projects by Resource Utilization

MediumSQL · PostgreSQL

Problem

WSP project leaders need to identify active projects where resource usage is highest relative to allocated capacity. Write a PostgreSQL query that ranks projects by their aggregate resource utilization.

Requirements

  1. Join projects to their resource assignments and include only projects with status = 'Active'.
  2. Calculate utilization as total hours_used divided by total hours_allocated, multiplied by 100.
  3. Use RANK() to rank projects from highest to lowest utilization and return the top three ranks.
  4. Return the project name, utilization percentage rounded to two decimals, and number of distinct resources. Exclude projects whose total allocated hours are zero.

Schema

projects
ColumnTypeDescription
project_idPKINTUnique project identifier
project_nameVARCHAR(150)WSP project name
statusVARCHAR(20)Project status
resource_assignments
ColumnTypeDescription
assignment_idPKINTUnique assignment identifier
project_idINTReferences projects.project_id
resource_nameVARCHAR(100)Assigned WSP resource
hours_allocatedDECIMAL(10,2)Hours allocated to the resource
hours_usedDECIMAL(10,2)Hours used by the resource
Tablesprojectsresource_assignments
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