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Object-based Models: Use objects as key data representation components.
Examples:-
Write short notes on tuple relational calculus. The tuple relational calculation is anon procedural query language. It defines the desired information without giving a particul
Consider the following relations: BRANCH( bno, street, area, city, pcode, Tel_no, Fax_no) STAFF( Sno, Fname, Lname, address, position , salary, bno) Express the subsequent qu
Deadlock And Its Prevention: As seen earlier, though two phase locking protocol handles the trouble of serialisability, but it causes some troubles also. For instance, consider th
Difference between Operating System and Database Security Security within the operating system can be executed at various levels ranging from passwords for access to system, t
Explain the Functional Mode with help of an example. Functional Model The functional model shows a computation and functional derivation of data values in it without ind
When are they useful? Justify with an example. The temporary tables are commonly used to support specialized rollups or exact application processing needs. Unlike a permanent t
What is object identity? An object retains its identity even if some or all the values of variables or explanations of methods change overtime.
Describe Database state in details? Database state: The actual data within the database at a particular moment in time is known as a database state.
What are stand-alone procedures? Procedures that are not part of a package are called as stand-alone because they independently defined. A good example of a stand-alone procedu
multiplicity constarin
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