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13 lines
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656 B
Markdown
13 lines
No EOL
656 B
Markdown
---
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title: 'Partial indexes are useful for enforcing rules that only apply conditionally'
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tweet_id: '1527688613932044289'
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thread_slug: weekly-thread-2022-20
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author_username: tobias_petry
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images:
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- 'https://pbs.twimg.com/media/FTCG2anXoAIB0U2.jpg'
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created_at: 2022-05-20T16:32:03+00:00
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slug: partial-indexes-are-useful-for-enforcing-rules-that-only-apply-conditionally
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---
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⚡️ Database Tip
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Sometimes you want to make columns unique but you can't because e.g. there are still soft-deleted rows in the table witht the same value. By only including relevant rows (partial index) you can still enforce uniqueness, and you can even simulate it for MySQL! |