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What is Primary key? Primary Key - Primary key is one of the candidate keys which uniquely identifies each row in the relation.
ER diagram on cosmetics
Question 1: (a) Planning and management of ICT projects have a very poor record in developing countries. Briefly explain five critical success factors for correct implementa
What is foreign key? A relation schema r1 derived from an ER schema may contain among its attributes the primary key of another relation schema r2.this attribute is known as a
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Consider the E/R schema with weak entity sets shown below. Come up with the SQL CREATE TABLE statements (with appropriate primary key, unique and foreign key constraints). Include
What is called mirroring? The simplest approach to introducing redundancy is to duplicate each disk. This method is called mirroring or shadowing.
Ask question #Minim 100 words accepted#what is recovery management component in database management system and how it is useful
What is B-Tree? A B-tree eliminates the redundant storage of search-key values .It permits search key values to appear only once.
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