Introduction of SQL Server

Data :
  It is raw fact through which an object can’t be identified.
Ex – employee no. name, salary of an employee are individually known as one one data

Information :
  Organized collection of related data is known as information through which an object can be clearly   identified.
It is raw fact through which an object can be identified.
Ex – employee no. name, salary of an employee are individually known as one one data

Data file :
  Organized collection of related information is known as a data file.
Ex – sales dept, purchase dept, admin dept of a particular company individually maintains their data file.

NOTE
  Through data is a raw fact through which an object can’t be identified but it minimum requirement of data base.
Why data base ?
 Data is maintained to keep track on object day to day traction. The advantage of data base management is to know assets / liability, profile /loss of an organization.

Database Engine:
      It is a windows service or core application that can be used to storing, process data in a relational format and securing data.

Features : 
1. Reliable Storage for data
2. Rapidly retrieve this data
3. Consistent access to the data
4. Control access to the data through security.