查询指定表的索引
SELECT T1.TABLE_NAME, T1.INDEX_NAME, T1.INDEX_TYPE, T1.UNIQUENESS, T1.TABLE_OWNER, T1.STATUS, T1.FUNCIDX_STATUS FROM ALL_INDEXES T1 WHERE T1.TABLE_OWNER = UPPER(‘&Owner‘) AND T1.TABLE_NAME = UPPER(‘&Table_Name‘) ORDER BY T1.STATUS DESC;
普通索引失效,主键和唯一性索引除外(为保障数据的规范性)
SELECT ‘ALTER INDEX ‘ || TABLE_OWNER || ‘.‘ || INDEX_NAME || ‘ UNUSABLE;‘ UNUSABLE_INDEX FROM ALL_INDEXES WHERE TABLE_OWNER = UPPER(‘&Owner‘) AND TABLE_NAME = UPPER(‘&Table_Name‘) AND INDEX_TYPE = ‘NORMAL‘ AND UNIQUENESS <> ‘UNIQUE‘;
并行(PARALLEL)重建索引，提升重建速度(在服务器空闲时执行)
SELECT ‘ALTER INDEX ‘ || TABLE_OWNER || ‘.‘ || INDEX_NAME || ‘ REBUILD PARALLEL;‘ FROM ALL_INDEXES WHERE TABLE_OWNER = UPPER(‘&Owner‘) AND TABLE_NAME = UPPER(‘&Table_Name‘) AND INDEX_TYPE = ‘NORMAL‘ AND UNIQUENESS <> ‘UNIQUE‘ AND STATUS = ‘UNUSABLE‘;
查询索引的状态和DEGREE并行度
注意：并行度默认设置为1，如果显示为default，表示数据库分配的cpu核心*2,重建完索引后并行度都改成1
SELECT ROWNUM, S.INDEX_NAME, S.INDEX_TYPE, S.TABLE_OWNER, S.TABLE_NAME, S.UNIQUENESS, S.STATUS, S.DEGREE, S.TABLESPACE_NAME FROM ALL_INDEXES S WHERE TABLE_OWNER = UPPER(‘&Owner‘) AND TABLE_NAME = UPPER(‘&Table_Name‘);
将索引并行度不是1的还原回1
SELECT ‘ALTER INDEX ‘ || S.TABLE_OWNER || ‘.‘ || S.INDEX_NAME || ‘ NOPARALLEL;‘ FROM ALL_INDEXES S WHERE TABLE_OWNER = UPPER(‘&Owner‘) AND TABLE_NAME = UPPER(‘&Table_Name‘) AND S.DEGREE <> 1;
原文：http://www.cnblogs.com/zhenxing/p/5167776.html