Graph Database A Gist - NEO4J

 Graph Database - The Comprehensive Landscape  

Graph Database as the name states, it's a database that uses various graph structures for storing & representing data. Its a NoSQL database which users graph theory to store, map and query the relationships. Since we say its a NoSQL all values are stored in (KV) pairs. Graph DB will handle more complex data and relationships, which are backed in at the data record level.

          When we say graph, we know its not going to be about tables, rows and columns. The graph DB uses nodes which will have  properties, labels etc. A record that is well known in a traditional DB is represented as an node. Every node will have values which is called properties.

For example 

 Any real world entity can be represented as a node. 

Let's take an example of a CAR

CAR is a node which contains the following properties

Name : Skoda 

Type  : Sedan 

A property can be a String, boolean, array, etc. We cannot have NULL as a property value, instead we can remove the property.

The nodes can be grouped by Labels. A Label can only be represented by String. it can't take up a numeric or alpha-numeric value.The Labels should Start with Camel-case and it can't properties tagged to them.

For example 

we have a Label Cars which will have following nodes

Name : Skoda              Name: Chev

Type : Sedan              Type : SUV

All the nodes are tagged to single Label Cars. A node can be connected to any number of labels or can also be left alone :). Similar to RDBMS graph DB can also have billions of records stored & grouped by labels.

NFC potentates payments in Near Future

In the E-commerce world ,NFC in the pool alongside many other payment technologies , we explore a fresh, innovative standing point through a stark comparison of NFC Payments versus all other types of technologies, to measure and plan your future strategy. Originally mobile payments and other mobile services, like mobile banking, relied on text messaging to complete transactions.  NFC offers the best of both worlds. Smartphones let a customer store multiple credit cards and other payment methods all in one device that the customer is likely to carry everywhere with them already. It cuts out the unnecessary hassle of texting or swiping through menus to make payments and yet still offers the security of a credit card. By offering a high level of compatibility with different companies and technologies, NFC can evolve into a one-step payment method that works anywhere the customer wants to make a purchase.