Rebuild an Index in Oracle

Q

How To Rebuild an Index in Oracle?

✍: FYIcenter.com

A

If you want to rebuild an index, you can use the "ALTER INDEX ... REBUILD statement as shown in the following SQL script:

SELECT index_name, table_name, uniqueness 
  FROM USER_INDEXES WHERE table_name = 'EMPLOYEES';
INDEX_NAME              TABLE_NAME            UNIQUENES
----------------------- --------------------- ---------
EMP_EMAIL_UK            EMPLOYEES             UNIQUE
EMP_EMP_ID_PK           EMPLOYEES             UNIQUE
EMP_DEPARTMENT_IX       EMPLOYEES             NONUNIQUE
EMP_JOB_IX              EMPLOYEES             NONUNIQUE
EMP_MANAGER_IX          EMPLOYEES             NONUNIQUE
EMP_NAME_IX             EMPLOYEES             NONUNIQUE

ALTER INDEX EMP_NAME_IX REBUILD;
Statement processed.

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