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Define the terms
i) DDL
ii) DML
DDL: Data base schema is specified by a set of definitions expressed by a special language known as a data definition language.
DML: A data manipulation language is a language that enables users to access or manipulate data as organized by the suitable data model.
Example: RELATIONAL SCHEMA for PERSON: PERSON (PERSON_ID: integer, NAME: string, AGE: integer, ADDRESS: String) RELATION INSTANCE In this instance, m = 3 and n = 4
Problem: ‘Users and Information system specialists need to spend inordinate amounts of time locating and gathering data' (Watson and Hal, 1998) Recent developments in the ar
Function requirement as given: 1> manage fans and likes and followings those information from facebook. twitter. google+ and linkedin etc 2> Organize the clients from email m
For every multivalued attribute 'A', we make a new relation R that contains an attribute corresponding to plus the primary key attribute k of the relation that shows the entity typ
what are the reasons having variable length records
(a) Data Mining Process : In the context of this cluster analysis project , and in your own words , explain how you would execute the first stage of data mining, namely the "P
Increases efficiency : Data is stored close to most often used site, therefore retrieval would be faster. Also, data that is not required by local applications is not stored, there
Briefly explain the state diagram by taking one example. State Diagram - An object can be given a sequence of input instructions. The state of the object can vary depending u
Which file organization provides very fast access to any arbitrary record of a file? Hashed file organization provides very fast access to any arbitrary record of a file.
Foreign Keys and NULL Let us take the relation: DEPT DEPT ID DNAME BUDGET D1 M
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