How to perform keyword query in mongodb?

@adan 

To perform a keyword query in MongoDB, you can use the find() method along with a regular expression to search for a specific keyword in a collection. Here's an example:

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db.collectionName.find({fieldName: {$regex: 'keyword', $options: 'i'}})

In this example:

• db.collectionName: the name of the collection you want to query
• fieldName: the name of the field in the collection you want to search for the keyword
• 'keyword': the keyword you want to search for
• $regex: operator used to perform a regex search
• 'i': case-insensitive option to match the keyword regardless of case

You can also use other query operators in combination with the regex search to further refine your keyword query.