INSERT in DB(INSERT ONE)
to insert:
DB.COLLECTION.ONE()
DB.STUDENT.ONE({NAME:"ABHI", AGE:21, MARKS:97})
HERE UNLIKE SQL THERE IS NO RESTRICTION ON KEY VALUE PAIRS(LIKE TABLES IN SQL) THAT EVERY COLLECTION SHOULD CONTAIN THE SAME ATTRIBUTES.
WE CAN CREATE NEW KEY VALUE PAIRS AS PER OUR WISH
TO VIEW COLLECTIONS:
DB.STUDENT.FIND()

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