Data Storage Hierarchy
A Database is an organized collection of data. The data is typically organized to model aspects of reality in a way that supports processes requiring information. Simply, it is a structured set of data held in a computer, especially one that is accessible in various ways.
Fundamental data concepts or Data storage hierarchy: Data may be logically organized bits, characters, fields, records, files, and databases.
- Bits: Bits is the smallest unit of data. The computer can store in a database. It is represented by zero off and one for on.
- Character (Byte): A character is a letter, number, or special character. Example, a, b, 1, 2, +, / etc.
- Field: A field consists of a grouping of character. For example, Person first name, street address.
- File: A file is a collection of related record. Example, An employee file world contains the records of the employees of a firm.
- Record: A record is a collection of related field. Example, The payroll for a person.
- Database: A database is a logically organized collection of related data design-build for a specific purpose. Or database is an integrated collection of logically related records or objects.
So, these are the various fundamental concepts of database management.