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Define the Immediate Update
The immediate update methods may apply changes to the database on disk before the transaction arrives a successful conclusion. Though, these changes are usually recorded in the log on disk by force writing previous to they are applied to the database, making recovery still possible.
prototype of a distributed information system for a national car part retail outlet chain.
Chapter 10a review questions
What is conceptual schema? The schemas at the view level are known as subschema that describe dissimilar views of the database.
I have been given 8 differebt data warehouseing failure case studies. I need to question 4 questions for each
Column Constraints: NOT NULL, UNIQUE, CHECK, PRIMARY KEY, DEFAULT, REFERENCES, On delete Cascade : Using this key whenever a parent row is removed in a referenced
Modular growth: In distributed environments, it is simple to expand. Latest sites can be added to the network without affecting the operations of other sites, as they are somewhat
coventions for displaying an ER schema as ER diagram
Dependency Preservation It is obvious that the decomposition must be lossless so that we do not lose any information from the relation that is decomposed. Dependency preservati
Differentiate between natural join and outer join? Natural join is a binary operator which is written as (R * S) where as R and S are relations. The output of the natural join
A set of possible data values is called? A set of possible data values is called as domain.
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