T-SQL: Find Duplicates Without Using JOIN

I’d forgotten about this lil trick.

Chrissy is a PowerShell MVP who has worked in IT for nearly 20 years, and currently serves as a Sr. Database Engineer in Belgium. Always an avid scripter, she attended the Monad session at Microsoft’s Professional Developers Conference in Los Angeles back in 2005 and has worked and played with PowerShell ever since. Chrissy is currently pursuing an MS in Systems Engineering at Regis University and helps maintain RealCajunRecipes.com in her spare time. She holds a number of certifications, including those relating to SQL Server, SuSE Linux, SharePoint and network security. She recently became co-lead of the SQL PASS PowerShell Virtual Chapter. You can follow her on Twitter at @cl.

Posted in SQL Server
3 comments on “T-SQL: Find Duplicates Without Using JOIN
  1. LaptopHeaven says:

    why not use SELECT DISTINCT?

  2. Chrissy says:

    Because that does not solve the problem — I want to find duplicate records, not distinct records.

  3. Luv2Code says:


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