how to get only specific fields in mongodb code example

Example 1: mongodb select specific fields

db.student.find({}, 'roll _id'); // <--- Just multiple fields name space separated
// OR
db.student.find({}).select('roll _id'); // <--- Just multiple fields name space separated
// OR
db.student.find({}, {'roll' : 1 , '_id' : 1 ); // <---- Old lengthy boring way

Example 2: find only one field mongodb

db.students.find({}, {roll:1, _id:0})

Example 3: get only some fields of document in mongodb

db.student.find({}, {roll:1, _id:0})
 same as SELECT roll FROM student

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Misc Example

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