How is the “like” function used in MongoDB?

In MongoDB, the $regex operator can be used to achieve a functionality similar to “like”. The $regex operator allows you to specify a regular expression to match the value of a field. Here is an example of using the $regex operator to implement a “like” functionality.

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

In the example above, “field” refers to the name of the field to match, while “pattern” is the string pattern to match. The $regex operator searches for documents that contain the specified pattern within the field value, and returns the matching results.

Please be aware that using the $regex operator may impact query performance as it requires performing regular expression matching. Therefore, consider performance issues carefully when using the $regex operator.