Check out example codes for "difference between nosql and sql". It will help you in understanding the concepts better.

Code Example 1

SQL						|    NoSQL
  relational			| non-relational
use structured query	| NoSQL databases have 
language and have a		| dynamic schemas for 
predefined schema.		| unstructured data.
are vertically scalable | are horizontally scalable.
are table based			| are document, key-value,
						| graph or wide-column stores.
are better for multi-row| are better for unstructured 
transactions			| data like documents or JSON.

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