---
title: "Discussion on \"How to use Comparison Query Operators in MongoDB inside aggregation when joining multiple tables?\" | Hashnode"
description: "Discussion on \"How to use Comparison Query Operators in MongoDB inside aggregation when joining multiple tables?\". using pipeline for join and comparisons between two data fields in MongoDB."
url: "https://hashnode.com/posts/how-to-use-comparison-query-operators-in-mongodb-inside-aggregation-when-joining-multiple-tables/622d0db6df08b9b823417f82"
---

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# [How to use Comparison Query Operators in MongoDB inside aggregation when joining multiple tables?](https://dinaalaaahmed.hashnode.dev/how-to-use-comparison-query-operators-in-mongodb-inside-aggregation-when-joining-multiple-tables?utm_source=hashnode&utm_medium=feed)

using pipeline for join and comparisons between two data fields in MongoDB.

Mar 12, 2022 · 2 min read · dinaalaaahmed.hashnode.dev  
Updated Mar 26, 2022  
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-   [#mongodb](https://hashnode.com/tag/mongodb)
-   [#sql-server](https://hashnode.com/tag/sql-server)
-   [#databases](https://hashnode.com/tag/databases)

## Written by

[Dina Alaa](https://hashnode.com/@dinaalaaahmed)

@dinaalaaahmed · Egypt

  
[View profile](https://hashnode.com/@dinaalaaahmed)

Senior Software Engineering Student at Cairo University

A Software Engineer student who likes coding. Interested in backend web development with a passion for encountering complex queries, database designing, and optimization.

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