What is clustered and non-clustered indexes?
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Answer Posted / 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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