Postgres 15 improves UNIQUE and NULL
Quick read
A short blog post explaining Postgres 15u2019s new UNIQUE NULLS NOT DISTINCT option. It shows how this option makes UNIQUE constraints treat NULLs as equal so repeated NULLs can be prevented.
- Explains difference between old and new UNIQUE behavior with NULLs
- Shows example tables demonstrating enforcement change
- Notes default behavior remains unchanged unless option used
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Postgres 15 improves UNIQUE and NULL was shared on NexURLs by skilo on October 17, 2026, in Tech & AI.
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