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Composite Index vs. Separate Indexes: Practical Performance Trade-offs?

Hello everyone, I'm currently working on a database design for a project and have a question about indexing strategy. I have a table with columns (user_id, project_id, status) that are frequently used in WHERE clauses for filtering and joining. I'm trying to decide on the best indexing approach for performance. From a real-world standpoint, what are the primary pros and cons of creating a composite index on (user_id, project_id, status) compared to creating three separate single-column indexes on each of those columns? golf hit In what specific scenarios would one approach be clearly superior to the other, and are there any major storage or query planner overheads I should be aware of? Any insights or a clear example would be greatly appreciated.

Posted on : Fri, Sep 5, 2025 2:21 AM
Posted By : Kevin Sanders

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