Answer
Projection specifies which fields to include or exclude when fetching documents, improving efficiency.
Quick Answer
Field projection controls which fields are returned in query results - reduces data transfer and memory usage. In find(), the second argument is the projection: {name: 1, email: 1} returns only name and email. {password: 0} excludes the password field. You can't mix include and exclude in the same projection (except for _id which can always be excluded).
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SugharaIQ Editorial Team
Verified Answer
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Source: SugharaIQ