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Top SQL Join and Grouping

MediumSQL · PostgreSQL00:00
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Your question is Top SQL Join and Grouping. Start with the requirements and the two tables on the right.

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Problem

Nomura's internal learning platform stores students and the divisions in which they are enrolled. Write a PostgreSQL query that returns the three highest-scoring students within every division.

Requirements

  1. Join students to divisions using division_id.
  2. Rank students separately within each division by score descending, with student_id ascending as the tie-breaker.
  3. Return only ranks 1 through 3, excluding students without a matching division.
  4. Sort the final result by division name and rank.

Schema

divisions
ColumnTypeDescription
division_idPKINTEGERUnique division identifier
division_nameVARCHAR(100)Nomura division name
students
ColumnTypeDescription
student_idPKINTEGERUnique student identifier
student_nameVARCHAR(100)Student's name
division_idINTEGERReferences divisions.division_id
scoreINTEGERAssessment score
Tablesstudentsdivisions
Your solutionPostgreSQL
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