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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.
DML Precompiler All the DBMS have two basic sets of Languages - Data Definition Language (DDL) that have the set of commands needed to define the format of the data that is b
What function divides one numeric expression by another and returns the remainder? MOD function divides one numeric expression by another and returns the remainder.
Examine about the Behavioural Diagrams The main objective of behavioural diagrams is to visualize, specify, construct and document dynamic aspects of a system. The interactio
Decompose the table with the following description and functional dependencies into a set of equivalent tables normalized to 3NF or BCNF. This database stores records from a (ve
An employee record has the following structure struct employee { int eno; char name[22]; float salary; char dept[10];}; (i) Calculate the record size R in bytes.
Implementation and SQL Applications
Define rotational latency time. The time spent waiting for the sector to be accessed to appear under the head is known as the rotational latency time.
write a database program for concurrency transaction in a bank
Need a sample of a clinic database relationships
What is the difference among a database schema and a database state? The collection of information stored in database at particular moment in time is known as database state a
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