Command Prompt Tutorial

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Commands (Cont. 1 )

You can check the no. of documents in a collection by using

> db.data.count()

Lets insert some documents into the collection "data", we have created

Just to clarify, our database name is data and our collection name is also data. 

( I should have used a different name for collection...my apologies...)


Syntax is:

db.collection_name.insert({"field":"value"});

>db.data.insert();

This is empty, which we have created.

So, lets insert some name

>db.data.insert({“name”:”abc”});

We can also specify multiple values for a single attribute.

>db.data.insert({“name”:”abc”,”ph”:[123,456]});

To check your documents in a collection, use the following command

>db.collection_name.find();

The unique ID above is generated based on the machine and current time. 

So, the combination of all these components makes a perfect unique key.

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