What is Projection Operators? List some Projection Operators available in MongoDB?
Sharad Jaiswal
Posted On: Jun 24, 2021
In MongoDB, projection operators are used for selecting only the necessary data rather than selecting the whole of the data of a document. Some of the Projection Operators available in MongoDB are:
- $ - Projects the first element in an array that matches the query condition.
- $elemMatch - Projects the first element in an array that matches the specified $elemMatch condition.
- $meta - Projects the available per-document metadata.
- $slice - Limits the number of elements projected from an array.
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