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a) Suppose we updated the catalog tables in real time, that is, after every update, insert, or delete SQL statement were executed-rather than only running RUNSTATS once every few days or longer.
Is this idea (real time updates), a good idea? Provide arguments both for and against.
b) Suppose the DBMS kept track of how long it took to execute each SQL statement: i.e., for every single SELECT, INSERT, UPDATE, and DELETE statement. Explain how the database system could use this information in some meaningful and practical ways to suggest to the DBA when it is time to reorganize the tables and indexes (or for the DBA to take other action).
c) When should a DBA consider dropping indexes from a table? Give at least 3 good reasons.
Some disadvantages of File Oriented System ?
What is the use of rename operation? Rename operation is used to rename both relations and an attributes. It uses the as clause, taking the form: Old-name as new-name.
We have a buildup of payments that need to be processed. You will need:- To prepare customer account on our site Process payment (you must have working Paypal account to d
What benefits can a company gain by managing its own information infrastructure and servicea
Problem 1. Describe the Oracle Architecture with a neat labeled diagram, Also explain the individual components of the Architecture. 2. Write about the following Oracle 9i o
Speedup Query Processing: A query that includes data at various sites can be split into sub-queries. These sub- queries can be implemented in parallel by various sites. Such parall
Explain several types of constraints that can be specified using CREATE TABLE command. Explain CASCADE and RESTRICT clauses of DROP SCHEMA command? Constraint Description PRIM
statical data
What are attributes? Give examples. An entity is shown by a set of attributes. Attributes are descriptive properties possessed by every member of an entity set. Example: pos
A Relation Schema represented by R(A1, A2, ..., An) is made up of the relation name the list of attributes and R Ai that it contains. A relation is described as a set of tuples
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