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Describe the benefits of OOD techniques
OOD techniques are very useful for development of large and complex systems. It has been noted that large projects that are developed using OOD techniques resulted in a 30% reduction in development times and a 20% reduction in development staff effort, as compared to same sized projects that are using traditional software development techniques.
losers with new information systems
Lack of Redundancy We have talked about the problems of repetition of information in a database. Such repetition should be stay away as much as possible. Let us state once again t
a need some real life examples of database management systems three level of ANSI SPARC architecture life teacher and student ,company and employee or for NGO etc.
Compute the closure (F+) for the following set of the functional dependencies defined on R(a,b,c,d), where F - {c→ a, ab → d, a → b, d → c}, i.e. what are all of the FDs implied b
State the process of Rearranging Classes and Operations The various, yet similar operation of different classes can be slightly modified thus that they can be covered by a sin
Greater potential for bugs: Since the sites of a distributed system operate simultaneously, it is more complex to ensure the correctness of algorithms. The art of constructing dis
Query Processor The query language processor is responsible for taking query language statements or shifting them from the English-like syntax of the query language to a form
What are aggregate functions? And list the aggregate functions supported by SQL? Aggregate functions are functions that take a collection of values as input and return a one va
In an E-R diagram an entity set is represent by? In an E-R digram entity set is represted by rectangle.
Consider the relations EMP(ENO,ENAME,AGE,BASIC_SALARY) WORK_IN(ENO,DNO) DEPT(DNO,DNAME,CITY) Express the following queries in SQL (i) Find names of employees who work in a dep
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