在ORACLE里按用户名重建索引的方法

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SET ECHO OFF;
SET FEEDBACK OFF;
SET VERIFY OFF;
SET PAGESIZE 0;
SET TERMOUT ON;
SET HEADING OFF;
ACCEPT username CHAR PROMPT 'Enter the index username: ';
spool /oracle/rebuild_&username.sql;

SELECT
'REM +-----------------------------------------------+' || chr(10) ||
'REM | INDEX NAME : ' || owner || '.' || segment_name
|| lpad('|', 33 - (length(owner) + length(segment_name)) )
|| chr(10) ||
'REM | BYTES : ' || bytes
|| lpad ('|', 34-(length(bytes)) ) || chr(10) ||
'REM | EXTENTS : ' || extents
|| lpad ('|', 34-(length(extents)) ) || chr(10) ||
'REM +-----------------------------------------------+' || chr(10) ||
'ALTER INDEX ' || owner || '.' || segment_name || chr(10) ||
'REBUILD ' || chr(10) ||
'TABLESPACE ' || tablespace_name || chr(10) ||
'STORAGE ( ' || chr(10) ||
' INITIAL ' || initial_extent || chr(10) ||
' NEXT ' || next_extent || chr(10) ||
' MINEXTENTS ' || min_extents || chr(10) ||
' MAXEXTENTS ' || max_extents || chr(10) ||
' PCTINCREASE ' || pct_increase || chr(10) ||
');' || chr(10) || chr(10)
FROM dba_segments
WHERE segment_type = 'INDEX'
AND owner='&username'
ORDER BY owner, bytes DESC;

spool off;

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如果你用的是WINDOWS系统, 想改变输出文件的存放目录, 修改spool后面的路径成:
spool c:/oracle/rebuild_&username.sql;

如果你只想对大于max_bytes的索引重建索引, 可以修改上面的SQL语句:
在AND owner='&username' 后面加个限制条件 AND bytes> &max_bytes

如果你想修改索引的存储参数, 在重建索引rebuild_&username.sql里改也可以.
比如把pctincrease不等于零的值改成是零.

如果你想把index从一个TABLESPACE转移到另外一个TABLESPACE，也可以修改其中的tablespace_name

信息来源: http://www.cnoug.org/viewthread.php?tid=28211