Scenario SQL Question

Find Data Quality Issues Across Multiple Columns

Build mastery in Finding Duplicates with this scenario-based SQL challenge and live execution support.

Problem Statement

Write a query to find employees with data quality issues (NULL in salary, department_id, or manager_id). Show how many quality issues each employee has.

Relevant Tables

employees

SQL Concepts Used in This Scenario

Strengthen your understanding with these targeted learning topics:

GROUP BY FundamentalsAggregate Functions & Grouping
HAVING ClauseAggregate Functions & Grouping
DISTINCT & Removing DuplicatesSQL Fundamentals