What is data structure
Introduction What is data structure :-
Data structure :- ‘ Data structure ‘ means structure of a data , data may be organize in many different ways like logically , mathematically , increasing and decreasing order depending on the particular organization .
Basic terminology
(i) . Elementary data organization .
(ii) . Grouped data organization .
Elementary data organization ; – Data is value or set of value data item refers to single unit of value .
Group data organization : – Data item may be divided into sub-item .
These are different basic terminology in data structure .
(i) . Entity
(ii) . Attributes
(iii) . Primary key
(iv) . Records
(v) . Files
(i) . Entity : – An entity is an object existing in real world with logically and physically manner . (Till attribute /property not known)
(ii) . Attribute : – Attribute are the property of that particular entity .
(iii) . Primary key : – Primary key is the property / value which uniquely identify any particular entity . example ;- roll no (from table for x)
(iv) . Records : – Record is the collection of attributes of a particular entity .
example : – R1 , R2 , R3 , R4 , R5
(v) . Files : – Files are the collection of all attributes the records of a given entity .
(vi) . Entity Set : – The table above defined is the entity set .
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