Ian Carnaghan

Eliminating duplicate rows from result-set using PostgreSQL

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  • Use the DISTINCT ON keyword in your query
  • To do a case-insensitive search do the following query
    SELECT DISTINCT ON(upper(surname)) surname FROM employees ORDER BY upper(surname)
  • This will return non-duplicate surnames.

 

Image Credits: Photo by Isis França on Unsplash.

Last Updated On April 07, 2018

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Ian Carnaghanhttp://www.carnaghan.com
I am a software developer and online educator who likes to keep up with all the latest in technology. I also manage cloud infrastructure, continuous monitoring, DevOps processes, security, and continuous integration and deployment.
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