Mongodb with rails

Mongodb Rails 3.

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Hi , in this article i am going to explain few basic concepts of Mongodb , and this article entirely for beginers only .

Mongodb:

--> Mongodb is an open source document -oriented database system.

--> Its the type of NoSQL .document oriented means it storing data as JSON format , so all we have here json format , simply key ,value pairs , generally we can see in relational database all the data is stored in tables and we mantains relationships among the tables we called these as relational databases.

--> One of the greater advantage of document oriented databases is it does not store the unused data . Here is small example so that we can understand more deeply

 {  
   Name: “Ratnakar”,  
   Hobby: “Playing Guitar”  
 }  

this is we call document . As I said before document contains key , value where each key represents one column in relational database. And i have another record(document) which stores some more extra fields

 {  
   Name: “Ratnakar”,  
   Hobby: “Playing Guitar”  
 }  
  {  
   Name: “Ratnakar”,  
   Hobby: “Playing Guitar”  
   Designation : Developement Engineer,  
   Location : AP  
 }  

so if we observe clearly the difference between relational and document oriented databases , unlike the relational databases where each record would have the same set of fields and unused fields might be kept empty,there are no empty fields in documents

--> No need of joins becoz documents and arrays reduces need of joins and many of advantages are there .

         Document oriented                      Relational based  
 -----------------------------------              -----------------------------------  
 collections                                    databases  
 documents                                      tables  
 filelds (key ,value)                           row and column  

I hope this will give some sort of idea to start learning mongodb ..I welcome your comments on this article so that i can improve further .thank you

Cheers,
Ratnakar

About the Author

Ratnakar is a Software Engineer, Blogger from India.His articles mainly focus on Ruby on Rails Technology.

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