What is clustered, non-clustured and unique index. How many
indexes can be created on a table ?

Answer Posted / amit

A clustered index are those which created by user manually
and non clustered are automatically created by oracle server
when we create a primary key or a unique key on a column.

and as many as indexes can be created on table but it will
reduces the performance of the database.

Is This Answer Correct ?    1 Yes 10 No



Post New Answer       View All Answers


Please Help Members By Posting Answers For Below Questions

How can you fetch first 5 characters of the string?

550


how to install mysql? : Sql dba

580


table structure: ---------------- col1 col2 ----- ----- 01-mar-2012 11:12:46 01-mar-2012 11:12:10 01-mar-2012 11:12:46 01-mar-2012 11:11:23 Write a query to display the result as shown below: col1 col2 ----- ----- 01-mar-2012 11:12:46 01-mar-2012 11:12:10

3336


where are cookies actually stored on the hard disk? : Sql dba

578


How do I trace sql profiler?

491






what are the differences between binary and varbinary? : Sql dba

529


How would you reference column values before and after you have inserted and deleted triggers?

619


Is it possible to link two groups inside a cross products after the cross products group has been created?

591


What is the purpose of a sql?

524


What are the types pl/sql code blocks?

609


Explain autonomous transaction.

632


What is cte sql?

515


What is java sql driver?

543


What are the different types of a subquery?

517


What is primary key and unique key?

542