Already have an account? Get multiple benefits of using own account!
Login in your account..!
Remember me
Don't have an account? Create your account in less than a minutes,
Forgot password? how can I recover my password now!
Enter right registered email to receive password!
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:
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
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:
What is a hash index? A hash index organizes the search keys, with their associated pointers, into a hash file structure.
You are required to program (in a high level language such as C, C++, Java) and implement a cache simulator which will have the following inputs and outputs:- INPUTS
Write the syntax of creating an INDEX ? Syntax of Creating an Index: CREATE [BITMAP] [UNIQUE] INDEX ON ( [, ] . . .);
How does the system cope up with a record crash when recovery is going on after the first crash? Ans: In a system the undo and redo operations are needed to be idempotent to c
The following relational database schema represents part of a simplified database used by a library: tblBook (BookID, Title, PublisherID, Category,Price) tblPublisher (Publishe
What are stored and derived attributes? Stored attributes: The attributes keeps in a data base are known as stored attributes. Derived attributes: The attributes that are de
What are the storage types? The storage types are: a) Volatile storage b) Nonvolatile storage
Express the subsequent query in SQL assumes which the data is stored within EMPLOYEE table with relevant fields (i) Display name, job, salary, and hire date of employee who are
Discuss the methods for a hash file to expand and shrink dynamically. What are the advantages and disadvantages of each? The hashing methods that permit dyanamic file expansi
What is Foreign Key Foreign Key: Sometimes we may have to work with an attribute that does not have a primary key of its own. To recognize its rows, we have to use the primar
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!
whatsapp: +91-977-207-8620
Phone: +91-977-207-8620
Email: [email protected]
All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd