What is an Index ? How it is implemented in Oracle Database ?

Question Posted / sawant

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What is an Index ? How it is implemented in Oracle Database ?..

Answer / guest

Index is an Oracle SQL object which we create to speed up
the query performance.
It is created automatically on those columns which contains
primary key or unique key.
We can also create the index manually by using create index
command.
Max 16 indexes can be defined per table.

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What is an Index ? How it is implemented in Oracle Database ?..

Answer / sawant

An index is a database structure used by the server to
have direct access of a row in a table.

An index is automatically created when a unique of primary
key constraint clause is specified in create table comman
(Ver 7.0)

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What is an Index ? How it is implemented in Oracle Database ?..

Answer / ankur jain

An Index is nothing, it is something like the index behind in your text book, using index we can find any topic in our text book very fast,, hence database index is also like that, oracle engine uses this index to find any particular row quickly..
This is automatically created when you create the primary key during creation of table..

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What is an Index ? How it is implemented in Oracle Database ?..

Answer / nishi

An index is a database structure used by the server to have direct access of a row in a table. An index is automatically created when a unique of primary key constraint clause is specified in create table comman (Ver 7.0)

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