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Bit

~Bit it is the smallest unit of data .it is a binary digit


Byte

~a byte is a collection of bits. Each byte consist of 8 bits. each byte represent a character.

Field

~a filed unit of data consisting of 1 or more character(byte). a field is the smallest unit of meaningful information in the database.

Record

~a record is a collection related fields/

Fields

~collection of related record.