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database relational model, Database Management System
what do you mean by primary key constraint?
Posted Date: 7/26/2012 7:04:55 AM | Location : United States
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Data, Explain three main attributes of data.
Explain three main attributes of data.
What is recursive closure and operation relational algebra, What is recursi...
What is recursive closure? Why is it not possible to describe this operation in relational algebra? Recursive closure is applied to recursive relationship. An instance of rec
Whenever the limit clause will be used, Whenever the LIMIT clause will be u...
Whenever the LIMIT clause will be used? LIMIT is used for the following kinds of problems: 1) Answering questions about first or last and largest or smallest 2) Splitting
Case-based online phone repair, please i request for your assistance in de...
please i request for your assistance in developing a case-based online phone repair
Explain a data dictionary, What is a data dictionary? Data Dictionary ...
What is a data dictionary? Data Dictionary is a main source of data in a data management system. Its major function is to carry the creation and management of data definition
Heterogeneous ddb and homogeneous ddb, Probelm: (a) A distributed datab...
Probelm: (a) A distributed database (DDB) is a collection of multiple, logically interrelated databases which are physically distributed over a computer network" (i) Give a
What are the objectives of advance object design, What are the Objectives o...
What are the Objectives of Advance object design After this unit, you shall be able to: combine three OOAD models to obtain operations on the classes; develop algo
Define tuple variable, Define tuple variable Tuple variable is a type o...
Define tuple variable Tuple variable is a type of variable whose domain is the set of all tuples.
Explain trivial dependency, Explain trivial dependency? Functional depe...
Explain trivial dependency? Functional dependency of the form α ->β. is trivial if α C β. Trivial functional dependencies are satisfied by all the relations.
Write short notes on schema diagram, Write short notes on Schema diagram. ...
Write short notes on Schema diagram. A database schema along with primary key and foreign key dependencies can be depicted pictorially by schema diagram. Every relation appears
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