MongoDB

Open Source document databaseOften refered to as NoSQL

JSON style Documents

{name: ‘stephen ward’, gender:’male’ , dob:’Nov. 12 ,1958’ , maritalStatus: ‘married’}

Or Compound Doc

{name: ‘stephen ward’, gender:’male’ , dob:’Nov. 12 ,1958’ , maritalStatus: ‘married’,skills:{mongoDB:’true’, javascript:’true’,SQL:’true’,COBOL:’false’}}

UM what was that

Yes if your a SQL DBA you just said WooooBecause you would have had to create a separate table called skills and do a JOIN .MongoDB does not have joins.So how you think of your SCHEMA will be completely different.

Simple ?

What took place

• There was no database named bigroup if there was then if would have switched to it. If there wasn’t if would still have said switched , but it would just create a new db of that name

• Therefore be carefull • Using the shell I can do some javascript like

calls.

How about a little update

The update

• You’ll notice if I dont have an _id object then mongo makes the unique index for me.

• Save will insert if no unique index found or update if a unique index is found.

Add a sub-doc

Return partial

• Only want a subset of the collection

Like

OK lets have a little fun

• Node.js • Express• Mongojs