// Insert a new document in a collection
db.books.insert({"isbn": 9780060859749, "title": "After Alice: A Novel", "author": "Gregory Maguire", "category": "Fiction", "year":2016})

// Insert multiple documents into a collection
db.books.insert([
    { "isbn":"9781853260001", "title": "Pride and Prejudice", "author": "Jane Austen", "category": "Fiction"},
    {"isbn": "9780743273565", "title": "The Great Gatsby", "author": "F. Scott Fitzgerald"}
    ])

// Show all documents in the collection
db.collection.find()

// Filter documents by field value condition
db.books.find({"title":"Treasure Island"})

// Show only some fields of matching documents
db.books.find({"title":"Treasure Island"}, {title:true, category:true, _id:false})

// Show the first document that matches the query condition
db.books.findOne({}, {_id:false})

// Update specific fields of a single document that match the query condition
db.books.update({title : "Treasure Island"}, {$set : {category :"Adventure Fiction"}})

// Remove certain fields of a single document the query condition:
// $unset
db.books.update({title : "Treasure Island"}, {$unset : {category:""}})

// Remove certain fields of all documents that match the query condition
// $unset, {multi:true}
db.books.update({category : "Fiction"}, {$unset : {category:""}}, {multi:true})

// Delete a single document that match the query condition
// {justOne:true}
db.books.remove({title :"Treasure Island"}, {justOne:true})

// Delete all documents matching a query condition
db.books.remove({"category" :"Fiction"})

// Delete all documents in a collection
db.books.remove({})

// Drop a collection
db.books.drop()