Relational database management, Database Management System

Assignment Help:

For this application, we will consider IBM DB2 catalog data (i.e., metadata) for IBM's enterprise-class servers running the z/OS (formerly OS/390 or MVS) operating system.  One of the outcomes of this question is to give you some experience in actually exploring the contents of what's in an RDBMS catalog.  This will also  give us a head start in thinking about query optimization-a major part of this course.

Go to this Web site: 

SYSIBM.SYSCOLUMNS

SYSIBM.SYSCOPY

SYSIBM.SYSDATABASE

SYSIBM.SYSDBRM

SYSIBM.SYSINDEXES

SYSIBM.SYSINDEXPART

SYSIBM.SYSPLAN

SYSIBM.SYSTABLEPART

SYSIBM.SYSTABLES

SYSIBM.SYSTABLESPACE

SYSIBM.SYSTABLESPACESTATS

In this course, we will frequently encounter a program that is a crucial component of an RDBMS.  That program is called an optimizer.  It tries to determine the optimal access path when accessing (e.g., retrieving) data in a database.  An optimizer obtains statistics or metadata (i.e., data about data) from a data repository in the DBMS called a catalog.  The catalog will have information about the columns of tables and indices; the number of rows in a table; the numbers, types, and (possibly) distribution of values for columns in  the tables; and literally hundreds of other pieces of information.


Related Discussions:- Relational database management

What are composite objects, What are composite objects? Objects that ha...

What are composite objects? Objects that have other objects are known as complex objects or composite objects.

Cartisian product, Explain the cartesian product in Database Management Sys...

Explain the cartesian product in Database Management System

Cartisian product, Explain the cartesian product in Database Management Sys...

Explain the cartesian product in Database Management System

Integrity of a database enforced by integrity rules, Question: This Que...

Question: This Question refers to the database schema given in the Appendix. (a) The integrity of a database is enforced by integrity rules. Discuss what should happen on a

Mixed fragmentation, Mixed fragmentation: Sometimes, horizontal fragmentati...

Mixed fragmentation: Sometimes, horizontal fragmentation or vertical fragmentation of a database schema by itself is insufficient to sufficiently distribute the data for some appli

Need some database of usa and uk, I want Database Of United Kingdom with Cr...

I want Database Of United Kingdom with Criteria of:\r\n\r\n1). Name, Number, City, State, Postal Code, Address, Email id, DOB.\r\n\r\n2). Unsecure Debts only adds Credit Card Payme

In an e-r diagram an entity set is represent by, In an E-R diagram an entit...

In an E-R diagram an entity set is represent by? In an E-R digram entity set is represted by rectangle.

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd