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What is abstraction?
Abstraction in the object orientation is a idea that provide opportunity to express necessary properties of object without providing much details of the implementation of these properties.
Nested Queries Let us see some more complex queries in this section. Sub-queries: Some of the basic concerns of sub-queries are: A sub-query is a SELECT statemen
What are the requirements to ensure the objectives of file management principle is realized?
East Coast Aquarium Relational Database
Home based assignment Consider an ORDER table with the following attributes: • Order Number (ONo),Customer Number (CNo),Customer Name (CNa),Item Number (INo),Unit Price (UP), Quant
Which is an advantage of view? The Advantages of view is Data security, Derived columns and Hiding of complex queries
The aims of the project are: 1. To enable the students to undertake the detailed design of a specific plant or process 2. The design projects includes: process selection; und
What is an ERD?
Explain the two types of participation constraint. Total: The participation of an entity set E in a relationship set R is said to be total if each entity in E participates i
Which data manipulation command combines the records from one or more tables ? JOIN data manipulation command combines the records from one or more tables.
Define union compatibility? Explain why INTERSECTION of two relations cannot be performed if they are not union compatible? Two relations R(A1, A2,-------, An) and S(B1, B2,--
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