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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.
In which format database schema is written ? Data base schema is written in the DDL format.
What are the Objectives of Advance object design After this unit, you shall be able to: combine three OOAD models to obtain operations on the classes; develop algo
List any eight applications of DBMS. a) Universities b) Airlines c) Banking d) Credit card transactions e) Tele communication f) Sales g)Finance h) Manufac
Question: Describe briefly the three parts of the Relational Model. (a) The term integrity refers to the accuracy or correctness of the data in the database. Define the fol
Write a Query that uses the UNION Operator 1. Use the Software Experts database to: a. Display the first and the last name of all consultants who worked on any projects f
How does the two phase protocol ensure serializability in database schedules? Ans: A transaction is termed to follow the two-phase locking protocol if all locking operations
The H. I. Topi School of Business operates international business programs in 10 locations throughout Europe. The school had its first class of graduates in 1965. The school keep
Types of data independence Data independence can be classified into the following two types: Physical Data Independence: This means that for any change made in the physi
Define Timestamp ordering Ans In timestamp-based method, a serial order is made among the concurrent transaction by assigning to every transaction a unique nondecreasing number
What is conceptual model ? A conceptual model is a independent of both hardware and software.
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