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What is a view?
A view is a logical view on one or more tables. A view on one or more tables i.e., the data from a view is not actually physically kept instead being derived from one or more tables.
A database will be made to store information about patients in a hospital. On arrival, each patient’s personal details (name, address, and telephone number) are recorded where poss
These are interactive interfaces, graphical that hide the difficulty of the DBMS and query language behind an intuitive, simple to understand, and convenient interface. This permit
What is an ERD?
Question: (a) Discuss the difference between a composite key and a composite attribute. How would each be indicated in an E-R diagram? Support your answer with appropriate exam
Explain retrieval in QBE? Retrieval in QBE : A "GUI" for expressing queries. Based on the Domain Relational Calculus (DRC) Actually invented before GUIs. Very co
The natural join is equal to which product? The natural join is equal to Combination of projection and Cartesian product
what is natural join?
List the types of authorization. A) Read authorization B) Write authorization C) Update authorization D) Drop authorization
a brief definition
What is the difference between link and reference? The fundamental difference between links and references is that links are symmetrical on the other hand references refer only
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