---
title: "Boolean Operators"
url: "https://help.quartet.pro/en/article/boolean-operators"
language: "en"
last_updated: "2025-09-24T18:11:00.933Z"
---

# Boolean Operators

Boolean operators can be used to combine or exclude keywords, country codes, dates, other search strings, and other search fields in a search query.

Boolean operators may be used to combine or exclude multiple terms within one expression or multiple queries from the Timeline. 

| **AND** | All terms must be present | boat **AND** propeller |
| --- | --- | --- |
| **OR** | Either or both terms are present | car **OR** vehicle **OR** truck |
| **NOT** | The term following NOT is excluded | bass **NOT** fish |

### Different methods of using Boolean operators

Basic search query with Boolean operators

**TA=((lap\_top OR desktop OR pc) AND (power OR battery OR charg\*))**

Combining multiple fields and associated expressions

**TA=(lap\_top OR desktop OR pc) AND FT=(Charg\* 3D cable?)**

  
Combining non-text fields such as dates with text fields such as title and abstract

**TA=((lap\_top OR desktop OR pc) AND (power OR battery OR charg\*)) AND CC=US AND PUBD>=2002-07-04**

  
Combine or exclude results from multiple search queries in the Timeline

**(1 OR 2 OR 3) AND 4 NOT 5**