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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.
I am doing research in this area, especially in sime join and join efficacy when several relations have been queried. Relations located in different sites. I need something like n
Name the various privileges in SQL? A) Delete B) Select C) Insert D) Update
#what is cursor its uses ? Explain it
what is meant semantic query optimization? how does it differ from other query optimization techniques?
1. Determine that the Checkpoints are a part of Ans: Checkpoints are a part of Recovery measures
The Transactions- A transaction is definite as the unit of work in a database system. Database systems that deal with a huge number of transactions are also termed as transaction p
What is the meaning of Data Independence ?
Some disadvantages of File Oriented System ?
Why 'AS' clause is used in SQL ? 'As' clause is used for Rename operation. ‘AS' clause is used in SQL for rename operation. (e.g., SELECT ENO AS EMPLOYEE_NO FROM EMP)
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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