What is clustered and non-clustered indexes?

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What is clustered and non-clustered indexes?..

Answer / thangaprabu.n

Apart From above answer,One table Contain only 1 Cluster
index and 249 Non-Cluster Indexes

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9 Yes

2 No

What is clustered and non-clustered indexes?..

Answer / shubhi

There are clustered and nonclustered indexes. A clustered
index is a special type of index that reorders the way
records in the table are physically stored. Therefore table
can have only one clustered index. The leaf nodes of a
clustered index contain the data pages.

A nonclustered index is a special type of index in which
the logical order of the index does not match the physical
stored order of the rows on disk. The leaf node of a
nonclustered index does not consist of the data pages.
Instead, the leaf nodes contain index rows.

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9 Yes

3 No

What is clustered and non-clustered indexes?..

Answer / nive

clustered index are physically sorted

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6 Yes

2 No

What is clustered and non-clustered indexes?..

Answer / ganesh sial

both index are stored physically but cluster index is create block of key value which more helps to like join,hash condition,more reliable to parent child relation ship

ex:- deptno is primary key for dept table, its create cluster index,

when write query of join like

select a.empno,a.deptno,b.loc from emp a,dept b where a.deptno=b.deptno

this case the cluster index helps to better perfomance

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