what purpose of Indexing creating? directly we can search the reqired row with

what purpose of Indexing creating? directly we can search
the reqired row with the help of query?what is the use of
indexing?

Question Posted / sharfuddin

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what purpose of Indexing creating? directly we can search the reqired row with the help of query?wh..

Answer / madhunathanv

Main Purpose of Index creation is the for the Quick
retrieval of data ie.., speed up searching, from the
Table,where by it is created in the page index ,so that
instead of searching out for whole records from the table
when the query is executed it goes to page id and finds the
index id created and retrieves out the data based on
indexid ,so that time it takes becomes less when compared
to non creation of index.

By default when index is not created primary key will be
the default index.
The sysindexes table, which exists in every database,
tracks table and index information

AFAIK

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what purpose of Indexing creating? directly we can search the reqired row with the help of query?wh..

Answer / d. shyamala

Indexing is helpful when you have data which is used for
retrieval rather than transactions. Indexing results in
quick retrieval of data. But Indexing should be minimized
in the database where you have lots of transactions.
Indexes are of two types Clustered and non-clustered.

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what purpose of Indexing creating? directly we can search the reqired row with the help of query?wh..

Answer / madhunathanv

Apart from Clustered index def:

Indexes should be used to the column where frequently data
is retrieved.

AFAIK

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