Hierarchy of Data
Bit - represented by 0 for OFF and 1 for ON
Byte - a collection of data
Field - unit of data consisting of one or more characters
Record - a collection of related field
File- a collection of related record
Database - a structured collection of information on a specific subject
- easily accessed, updated and retrieve information
DBMS: - a program that accesses information from a database
- enables to extract, modify, and store information
Benefits:
(i) minimize data redundancy
(ii) data integrity is assured
(iii) ease of sharing data
(iv) information can be accessed easily
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