Database System Concepts
Database System Concepts
7th Edition
ISBN: 9780078022159
Author: Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher: McGraw-Hill Education
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Concurrency Control
The simultaneous occurrence of two or more operations is called concurrence and the situation is called concurrency. In concurrency, the function of one operation can affect the function of the other and put data integrity at risk. Hence, management for …
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Discuss the three layers of the Database architecture with examples of each layer.
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Transcribed Image Text:Discuss the three layers of the Database architecture with examples of each layer.
Refer to the sets below:- A = {Prasanna, Anna, Joanne, Bala, Mohamed, Chuang, Loges} B = {Linda, Anna, Jessy, Emeka, Francisso, Prasanna} C = {Hameed, Anna, Prasanna} D = {Hameed} Find the output for the following questions which is based on the set above, (a) Intersection between A, B and C. (b) Difference between B and C. (c) Union of C and D. (d) Cartesian product of C and D.
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Transcribed Image Text:Refer to the sets below:- A = {Prasanna, Anna, Joanne, Bala, Mohamed, Chuang, Loges} B = {Linda, Anna, Jessy, Emeka, Francisso, Prasanna} C = {Hameed, Anna, Prasanna} D = {Hameed} Find the output for the following questions which is based on the set above, (a) Intersection between A, B and C. (b) Difference between B and C. (c) Union of C and D. (d) Cartesian product of C and D.
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