Data Base :

this is just about database. Data base is actually not huge, its simple. simple doesn't mean that its simple to manage, here simple indicates it is very simple to learn and build career in database.
it is really playfull to work with it. it's not a programming language,  though it uses concepts of OOPS.

Data base- collection of data.

Before knowing about database, lets know about data.
Data - a meaningful content.
collection of data is database.

We have many databases in market. We have flavors in databases like SQL and NoSql.

here the data base we discuss is oracle and Mongo db. the first one is of type SQL and second one is NoSql.

we have NoSql in oracle also, but in order to know the difference between SQL and NoSql we consider these two databases. 

we will not go into the histories of both the databases. we will start directly from the main goals of these databases. Oracle SQL db is mainly focused for SQL and PL/SQL
MongoDb is focused on  NoSql.

lets start oracle SQL first:
Oracle has the following conventions:
MongoDb has the following conventions:

1. Table

2. Row(Tuples)

3. Column(Attributes)

4. Data Types

5. views

6. synonyms etc

1. Collection

2. key value pairs

3. embedded documents.

there are many differences between the SQL and NOSQL, thought their main motto of managing and storing the data remain same. 

SQL: they are Relational Database Management Systems.

NoSQL : they are non relational databases or distributed databases.