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$Regex Operator In Mongodb

In this article, we will discuss the $regex operator in MongoDB.

Purpose

The $regex operator is used to search the document using the regular expression.

db.collection.find({ "field": { $regex: /pattern/ } })

In this example, we will use a collection of Articles. We require to get all the documents that contain the word Mongo. So, the query would be: -

db.Articles.find({subject:{$regex:/Mongo/}})

Similarly, we can query the document to return all documents that start with the word Mongo. For that, we will use ^. The query will be: -

db.Articles.find({subject:{$regex:/^Mongo/}})

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