---
title: "How to speed up COUNT(DISTINCT)"
url: https://daily.dev/posts/how-to-speed-up-count-distinct--zdkolmku7
source_url: https://www.eversql.com/how-to-speed-up-countdistinct/
type: article
source: "EverSQL"
published: 2024-01-17T13:19:03.936Z
updated: 2024-01-17T13:19:03.130Z
tags: ["performance"]
reading_time: 15
upvotes: 11
comments: 0
language: en
---

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# How to speed up COUNT(DISTINCT)

**[EverSQL](https://daily.dev/sources/eversql)** · 15 min read · 11 upvotes · 0 comments

## Summary

This post provides various methods to speed up COUNT(DISTINCT) SQL queries. It explains the difference between COUNT(*) and COUNT(field), suggests using database estimates, aggregations, covering indexes, materialized views, and HyperLogLog data structures to improve performance.

## Full article

daily.dev links to this article rather than hosting it. Read it at the original source: <https://www.eversql.com/how-to-speed-up-countdistinct/>

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Tags: [#performance](https://daily.dev/tags/performance)

[View this post on daily.dev](https://daily.dev/posts/how-to-speed-up-count-distinct--zdkolmku7)