Write short notes on index structure of files, Database Management System

Assignment Help:

WRITE SHORT NOTES ON INDEX STRUCTURE OF FILES?

There are two basic parts of indices

1.   Ordered indices

2.   Hash indices

Every technique must be evaluated on the basis of these factors:

  • Access types
  • Access time
  • Insertion time
  • Deletion time
  • Space overhead

Ø  Ordered indices

Ø  Primary index

Ø  Dense and sparse indices

Ø  Multilevel index

Ø  Index update

Ø  Secondary indices

B+-Tree index files

B+-Tree index structure is the most widely used of various index structures that maintain their efficiency despite insertion and deletion of data.

Ø  Structure of B+-Tree

Ø  Queries on B+-Tree

Ø  Update on B+-Tree

Ø  B+-Tree file organization

Ø  B-Tree index files

 


Related Discussions:- Write short notes on index structure of files

What are the problems in database normalization, What are the problems if o...

What are the problems if one were not to normalize?  When do these problems surface?           Ans:  Database normalization, sometimes considered to as  canonical synthesis, is

Two phase locking technique, growing phase and shrinking phase are disjoint...

growing phase and shrinking phase are disjoint, why ?

Draw enhanced er-diagram for hierarchy of a student database, Draw an EER d...

Draw an EER diagram that captures the "is-a" hierarchy of students in another simple database. The database captures both the "basic" information (say, student ID and student name)

What is known as fudge factor, What is known as fudge factor? The numbe...

What is known as fudge factor? The number of partitions is enhanced by a small value called the fudge factor, which is usually 20 percent of the number of hash partitions compu

Using literal character string-data manipulation language, Using Literal Ch...

Using Literal Character String Example: To print IS A as one string with column name employee SELECT ENAME || ' IS A ' || JOB AS "EMPLOYEE" FROM EMP;

Assignment, how does Btree differ from a B+ - tree?

how does Btree differ from a B+ - tree?

Explain data dictonary on oracle, Explain data dictonary on oracle ? Da...

Explain data dictonary on oracle ? Data Dictionary - Data dictionaries are the system tables in which contain descriptions of the database objects and how they are structured.

Constraints violation during insertion, If the insertion violates one or mo...

If the insertion violates one or more constraints, then two alternatives are available: Default option: - Insertion can be discarded and the reason of refusal can also be ex

Distinguish among a datareader class and a dataset class, Question (a) ...

Question (a) Concurrent access to data from a database is a normal part of application program usage. Describe three approaches to concurrency control (b) Distinguish among

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