前言1.limit()方法

db.collection.find().limit(NUMBER)
> db.lesson.insertMany([{"name":"lua", "price":"$20.00"}, {"name":"Go", "price":"$30.00"}, {"name":"python", "price":"$40.00"}])
{
 "acknowledged" : true,
 "insertedIds" : [
  ObjectId("5c78d839b881b2c3b7328602"),
  ObjectId("5c78d839b881b2c3b7328603"),
  ObjectId("5c78d839b881b2c3b7328604")
 ]
}
> db.lesson.find().limit(2)
{ "_id" : ObjectId("5c78d839b881b2c3b7328602"), "name" : "lua", "price" : "$20.00" }
{ "_id" : ObjectId("5c78d839b881b2c3b7328603"), "name" : "Go", "price" : "$30.00" }2.skip()方法

db.collection.find().skip(NUMBER)
> db.lesson.find().skip(1)
{ "_id" : ObjectId("5c78d839b881b2c3b7328603"), "name" : "Go", "price" : "$30.00" }
{ "_id" : ObjectId("5c78d839b881b2c3b7328604"), "name" : "python", "price" : "$40.00" }
> db.lesson.find().skip(1).limit(1)
{ "_id" : ObjectId("5c78d839b881b2c3b7328603"), "name" : "Go", "price" : "$30.00" }
> db.lesson.find().limit(1).skip(1)
{ "_id" : ObjectId("5c78d839b881b2c3b7328603"), "name" : "Go", "price" : "$30.00" }总结

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