Need for multiple access paths, Database Management System

Need for Multiple Access Paths

In practice, most of the online information systems need the support of multi-key files. For example, consider a banking database application having a lot of different kinds of users such as:

  • Teller
  • Loan officers
  • Brach manager
  • Account holders

All of these users access the bank data though in a diverse way. Let us suppose a sample data format for the Account relation in a bank as:

Account Relation:

Account

Number

Account

Holder Name

Branch

Code

Account type

Balance

Permissible

Loan Limit

 

 

 

 

 

 

A teller may access the record over to check the balance at the time of withdrawal. One needs to access the account on the basis of account number and branch code. A loan approver may be interested in searching the potential customer by accessing the records in declining order of permissible loan limits. A branch manager may need finding the top ten most preferred customers in each category of account so may access the database in the order of balance and account type. The account holder may be interested in his/her own record. Therefore, all these applications are trying to refer to the similar data but using dissimilar key values. Therefore, all the applications as above need the database file to be accessed in dissimilar order and format. What may be the most efficient way to give faster access to all such applications? Let us talk about two approaches for this:

  • By Replicating Data
  • By providing indexes.
Posted Date: 3/8/2013 6:16:31 AM | Location : United States







Related Discussions:- Need for multiple access paths, Assignment Help, Ask Question on Need for multiple access paths, Get Answer, Expert's Help, Need for multiple access paths Discussions

Write discussion on Need for multiple access paths
Your posts are moderated
Related Questions
need a DBMS system on any data for assignment.

Define what Immediate database modification technique uses?  Ans: Both undo and redo.

1.  Based on the dependency diagram, create a database whose tables are in at least 2NF, showing the dependency diagram for each table (as shown in class).  Label the types of depe

Consider student (std_id, std_name, date_of_birth, phone, dept_name). Put the data for a student with student id200, name arun, birth date 1 February, 1985, phone number (01110 328


Modify a sequence: ALTER SEQUENCE SEQSS INCREMENT 2 MAXVALUE 3000;   Removing a sequence: DROP SEQUENCE SEQSS;

Primary Key The primary key is the candidate key that is selected by the database designer as the principal denotes of identifying entities within an entity set. The left candi

Question 1 Indexes are ocasionally defines on a single field of a file called an indexing field. List and describe the different types of indexes Question 2 Consider a book i

Explain the disadvantages of using DBMS There could be a few disadvantages of using DBMS. As DBMS requires computers, we have to invest a good amount in acquiring the hardwa

Question 1 Explain the concept of Foreign Key. How a foreign key differs from a Primary Key? Can the Foreign Key accept nulls? Question 2 With a necessary example explain (i)