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Saving Derived Attributes to Avoid Re-computation
Data that is derived from other data should be stored in the computed form to avoid re-computation. For this, we could define new classes and objects and these derived classes must be updated if any of the base objects is changed.
what is meant semantic query optimization? how does it differ from other query optimization techniques?
Define query optimization. Query optimization refers to the process of search the lowest -cost method of evaluating a given query.
What is a recovery scheme? An integral part of a database system is a recovery scheme that can restore the database to the reliable state that existed before the failure.
random file sharing
The need for three level architecture The aim of the three level architecture is to divide each user's view of the database from the way the database is physically shown.
Eliminate Redundant Data In the "Database Relation" above, the primary key is made up of the D-ID and the Emp-ID. The database-name relies only on the D-ID. The similar databas
ER diagram on cosmetics
What is a relationship called when it is maintained between two entities? A relationship is called Binary relationship when it is maintained between two entities.
1) Define a job scheduling strategy that will meet business requirement of reporting availability by 6am CST for the following cubes? Show the job scheduling dependencies in a pict
What are the different approaches for database design? There are two basic approaches for database design which are as follows: Attribute driven: It compiles a list of att
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