In this tutorial we will learn how we can retrieve or fetch data from any document stored in a collection and how to delete any existing document stored in any collection.
These functions are equivalent to
DELETE query in MySQL
If we want to retrieve data against field
friends from document with
_id xyz123, it can be done with the help of below code snippet:
The output produced on console is:
Now, in our friends field, we have data as "andy", "John" and "Amit". If we want to remove "John" from the list, we can with the help of the below code.
The output of the query is:
"John" is removed from the field friends.