Regular expressions

There are several considerations that you have to take into account when querying in MongoDB. Let's look at some best practices for using regular expressions, query results, cursors, and deleting documents:

db.books.find({"name": /mongo/})

This is done to search for books in your books collection that contain the mongo name. It is the equivalent of an SQL LIKE query.

Note

MongoDB uses Perl Compatible Regular Expression (PCRE) version 8.42 with UTF-8 support.

While querying, you can use the following options:

Option	Description
i	This option queries case insensitivity.
m	This option only applies to multiline strings with anchors (* for the start and $ for the end). In this case, defining the m option will match the pattern at the beginning or end of each line...