Oracle Index

Oracle Index
An index is an optional structure associated with a table to have direct access to rows, which can be created to increase the performance of data retrieval. Index can be created on one or more columns of a table.

Indexes are automatically maintained and used by Oracle.


SQL>create index test on company (cname);

Index created.

SQL>drop index test;

Index dropped.

Altering Oracle Index
SQL>ALTER INDEX ix_emp_01 REBUILD ;