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Why, generally does an object-oriented system use the relational DBMS?
The reasons for using relational DBMS for OO systems could be any combination of following:
a. Many organizations have existing relational databases including existing business data.
b. Most commercial RDBMS come with "Object-Relational" extension which implements object database on top of a RDBMS.
c. Purely object databases are too complex to use, and lack standards like SQL.
Explain the Object-oriented decomposition Object-oriented decomposition targets at identifying individual sovereign objects that encapsulate both a state and certain behavio
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In E-R Diagram how relationship type is represented ? In E-R Diagram relationship type is represented as a Diamond.
Explain the Cartesian product: The Cartesian product operation does not need relations to union-compatible. The meaning of this is that the involved relations may have dissim
Submit the table creation statements (including constraints) for the Database Model. Submit them all in a single script file. Also submit a document explaining what test data yo
Chapter 10a review questions
How does a query tree represent a relational algebra expression? Ans: This includes transforming an initial expression (tree) into an equivalent expression (tree) that is
1. Create the tables for the play-scheme database as specified in the TMA. 2. Enter the data as given in the spreadsheet. 3. Create queries to retrieve specified information
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Concatenation operator Example : Printing name and job as one string as column name employees: SELECT ENAME||JOB "EMPLOYEES" FROM EMP;
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