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class&object, Database Management System
Posted Date: 9/30/2012 5:41:04 AM | Location : United States
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Give the reasons for allowing concurrency, Give the reasons for allowing co...
Give the reasons for allowing concurrency? The reasons for allowing concurrency is if the transactions run serially, a short transaction might have to wait for a preceding long
Draw an er diagram with primary key for a farm, Draw an ER diagram that rep...
Draw an ER diagram that represents the information described below. Show all entity sets, relationship sets, primary keys, and the mapping cardinality of the relationship sets.
Relational model, A model in database system mostly defines the organisatio...
A model in database system mostly defines the organisation of data or structure and a set of operations on that data. Relational model is a easy model in which database is represen
BI, (a) Why did SAP introduce the extended star schema?
(a) Why did SAP introduce the extended star schema?
Which language used in application programs for request data, Which languag...
Which language used in application programs to request data from the DBMS is referred? Language which is used in application program is DML to request data from the DBMS is ref
What are the concurrency issues, Concurrency issues Data integrity...
Concurrency issues Data integrity: Threads accessing same object need to be synchronized, such as: banking account. Deadlock: One or more threads in system are perman
Sorting-stacks, 1. Identify the comparisons and exchanges made to sort the ...
1. Identify the comparisons and exchanges made to sort the following array using the selection exchange sort technique. Note: you may not need all columns. Ori
Candidate keys, Super keys of a relation can have extra attributes. Candida...
Super keys of a relation can have extra attributes. Candidate keys are minimal super key, i.e. such a key have no extraneous attribute. An attribute is known as extraneous if even
What is first normal form, What is first normal form? The domain of att...
What is first normal form? The domain of attribute must contain only atomic (simple, indivisible) values.
Explain what is aggregation, Explain what is Aggregation ? Aggregation...
Explain what is Aggregation ? Aggregation: This is used whenever we intend to show a relationship between an entity and the relationship. There is no provision for this in th
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