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.

Posted Date: 3/7/2013 4:40:36 AM | Location : United States

Ask an Expert

Related Discussions:- Relational database management, Assignment Help, Ask Question on Relational database management, Get Answer, Expert's Help, Relational database management Discussions

Write discussion on Relational database management
Your posts are moderated

Write your message here..

Related Questions

Identification of concurrency, Identification of concurrency Identifica... Identification of concurrency Identification of concurrency: Dynamic model identifies concurrency. Two objects are said to be parallel (concurrent) if they can receive events a

Which sorting technique is used to sort databases, Which sorting technique ... Which sorting technique is used to sort databases, whose sizes are very big?  Give one such algorithm.  Why do sorting techniques like quicksort, insertion sort, etc.  not applied

Explain composite attribute in sql, Explain Composite attribute in SQL ? ... Explain Composite attribute in SQL ? Composite attribute: A composite attribute has many components, each of that is atomic or composite.

Database design and documentation, A use case diagram giving a pictorial ov... A use case diagram giving a pictorial overview of user requirements and brief use case descriptions. As the case study contains only an outline of a business scenario, you will als

Explain the need for the bcnf normal form, Surgeons identified by doctor ID... Surgeons identified by doctor ID (DOCID) operate on patients identified by patient ID (PATID) in operating theaters identified by room numbers (ROOMNO). Each surgeon can operate on

Discuss the concept of data independence, Question: a) Discuss the conc... Question: a) Discuss the concept of data independence, explaining its importance in a database environment. b) To address the issue of data independence, the ANSI-SPARC t

Entity Relationship for music band managem modeliing, i am required to come... i am required to come up with entities relationships, optionality and cardinality from a scenario. there is a night club and bookings for a musician band

Why dml is used for, Why DML is used for? DML is used to Manipulation and... Why DML is used for? DML is used to Manipulation and processing of database. DML is provided for manipulation & processing of database. (Data stored in the database is processed

Describe the functions and features of foreign key, Describe the functions ... Describe the functions and features of foreign key? Foreign Key : The primary key of one file or table that is implanted in another file or table to implement the relationships

Normalization, in case of functional dependencies how we get the higher nor... in case of functional dependencies how we get the higher normal form.