In Webdock’s Beginner’s Guide: Clustered vs Non-clustered Index, you'll find a clean breakdown of how these two index types impact performance:
- Clustered Index - orders data physically by the indexed column. Ideal for range queries, but only one allowed per table.
- Non-clustered Index - lives in a separate B-tree structure with pointers to the data. Multiple per table, great for specific lookups.
Key reminders:
- Clustered is table-level sorting; best for ranges (e.g., id, timestamps).
- Non-clustered assists lookups on filtered fields (e.g., username, email), at some write cost.
Understanding when and how to use each can turn slow queries into efficient hits.
→ Read the full guide:
https://webdock.io/en/docs/how-guides/database-guides/beginners-guide-clustered-vs-non-clustered-index
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