---
title: Constant query expression
slug: '179'
canonical_url: https://docs.coveo.com/en/179/
collection: glossary
source_format: adoc
---
# Constant query expression
The {doctitle} (`cq`) is a part of the combined [query](https://docs.coveo.com/en/231/) expression.
It's similar to the [advanced query expression (`aq`)](https://docs.coveo.com/en/175/), but it must hold expressions such as a search scope that are constant for all users of a specific [search interface](https://docs.coveo.com/en/2741/) or search [tab](https://docs.coveo.com/en/1406/).