---
title: "Index — Database Glossary | Xata"
description: "A data structure maintained alongside a table to accelerate lookups on specific columns. Trades write performance and storage for faster reads."
source: "https://xata.io/glossary/index"
---

# Index

Core Database

A data structure maintained alongside a table to accelerate lookups on specific columns. Trades write performance and storage for faster reads.

Related terms

[B-tree](/glossary/b-tree)GINGiST

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