How to find duplicate rows using SQL

How to find duplicate rows using SQL

The following SQL query will return all the rows that have a duplicate value for the column someColumn. The number of duplicates is stored in the OccurCount variable.

SELECT someColumn COUNT(someColumn) AS OccurCount FROM someTable GROUP BY someColumn HAVING (COUNT(someColumn) > 1);

Nathan Pakovskie is an esteemed senior developer and educator in the tech community, best known for his contributions to With a passion for coding and a knack for simplifying complex tech concepts, Nathan has authored several popular tutorials on C# programming, ranging from basic operations to advanced coding techniques. His articles, often characterized by clarity and precision, serve as invaluable resources for both novice and experienced programmers. Beyond his technical expertise, Nathan is an advocate for continuous learning and enjoys exploring emerging technologies in AI and software development. When he’s not coding or writing, Nathan engages in mentoring upcoming developers, emphasizing the importance of both technical skills and creative problem-solving in the ever-evolving world of technology. Specialties: C# Programming, Technical Writing, Software Development, AI Technologies, Educational Outreach

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