Unique Indexes in MongoDB

Lecture Notes
In this video, Dwight uses the ensureIndex command, which is now deprecated. You would now use createIndex.

Quiz

Quiz: Unique Indexes

If an index is created with the options document, { unique : true } can 2 documents which do not include the field that is indexed exist in the same collection?
Yes

No
Ans.

NO

Quiz: Concepts

Quiz: Concepts

What were the big differences in hardware over the last few decades that MongoDB attempted to address?

Parallelism of coresParallelism of serversQuantum computersFaster clock speedsMore memoryScaling

Q: When scaling out horizontally (adding more servers to contain your data), what are problems that arise as you go from, say, 1 commodity server to a few dozen?

The original server, if incorporated into the cluster, is more likely to fail in a given unit of time than if it had been left as a single server.The servers must communicate with one another eating up network bandwidthThe need for redundancy increases as the likelihood of some failure in the system per unit of time increases.Hardware cost per server is likely to increase.

Overview of MondoDB Advance, Administrative commands of mongoDB.

Query Language Cursors in MongoDB,

Sorting in mongoDB using shell query.

Example of MongoDB shell query.

Query projection in mongodb.

Query of mongoDB basics.

Cursors introductions in mongoDB

Import json and data in MongoDB

Introduction of MongoDb Shell

Dynamic schema in mongoDb

Dynamic BSON

Binary Json introduction

Json RFC Rule and replication in json

Json to XML Conversion

Data types in json

Installing MongoDB windows versions

Installing Mongodb on mac

Introduction of mongodb