This post explains the different ways to find duplicate values in SQL using DISTINCT and COUNT, GROUP BY and COUNT, and ROW_NUMBER functions. It provides examples and guidance on how to use these functions to identify duplicates in single columns or across multiple columns. The post also highlights the importance of managing duplicates in data storage and processing.

7m read timeFrom sqlshack.com
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IntroductionDISTINCT and COUNT:GROUP BY AND COUNTROW_NUMBERConclusionSee more

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