mongodbHow to use regex in MongoDB?

MongoDB supports the use of regular expressions to search for strings within documents. To use regex in MongoDB, the $regex operator is used in a find() query.

For example, the following query will find all documents in the users collection where the name field contains the string John:

db.users.find({name: {$regex: /John/}})

The code above consists of the following parts:

• db.users.find(): This is the find() query used to search for documents in the users collection.
• {name: {$regex: /John/}}: This is the condition used to search for documents where the name field contains the string John. The $regex operator is used to specify that a regular expression should be used for the search. The regular expression /John/ is used to search for the string John.

For more information, see the MongoDB documentation.

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