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Oracle ?????????

Oracle ????

? Oracle ????????????????????????????????????????

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1. ?????

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CREATE TABLE indexTable (    ID VARCHAR2(10),    NAME VARCHAR2(20),    CONSTRAINT pk_id PRIMARY KEY (ID))ORGANIZATION INDEX;

2. ??????

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CREATE INDEX idx_secondary_name ON indexTable (NAME);

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CREATE INDEX idx_reverse_id ON tbl_reverse_idx (id) REVERSE;

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CREATE BITMAP INDEX idx_secondary_name ON indexTable (NAME) BITMAP;

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CREATE INDEX idx_emp_ename_lower ON emp (LOWER(ename));

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• ORA-28669?

  ?bitmap ??????? IOT ?????????
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  ?? IOT ??????????????

  ALTER TABLE indexTable MOVE MAPPING TABLE;

2. ????

• B-tree ?????

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  ALTER INDEX idx_name REBUILD ONLINE;

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  ALTER INDEX idx_name REBUILD PARTITION p2_idx_name;

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  ALTER INDEX idx_name USE NONE|INDEX;

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  ALTER INDEX idx_name UNUSABLE;

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  ALTER INDEX idx_name INVISIBLE|VISIBLE;

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  SELECT * FROM V$OBJECT_USAGEWHERE INDEX_NAME = 'idx_name'AND TABLE_NAME = 'table_name';

Clustering Factor ??

• Clustering Factor?CF??
  CF ?????????????????????
  • ????? CF?? CF ?? 1000????????????
  • ??????????????????????

??????????? Oracle ??????????????????

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