ORACLE 删除用户及空闲表空间释放空间

第一步：删除过期用户

DROP USER colin CASCADE;

第二步：查询过期用户相关的表空间是否还有对象

SELECT OWNER, SEGMENT_NAME, SEGMENT_TYPE, TABLESPACE_NAME
  FROM DBA_SEGMENTS
 WHERE TABLESPACE_NAME IN
       (SELECT TABLESPACE_NAME
          FROM DBA_TABLESPACES
         WHERE TABLESPACE_NAME LIKE '%COLIN%')

第三步：转移过期用户表空间上的对象到其他表空间

ALTER TABLE tab_colin MOVE TABLESPACE colin_song_tbs;

ALTER INDEX idx_tab_colin REBUILD TABLESPACE colin_song_idx_tbs;

第四步：查询无对象的表空间

SELECT 'DROP TABLESPACE ' || TABLESPACE_NAME ||
       ' INCLUDING CONTENTS AND DATAFILES;'
  FROM DBA_TABLESPACES
 WHERE NOT EXISTS (SELECT 12
          FROM DBA_SEGMENTS
         WHERE DBA_SEGMENTS.TABLESPACE_NAME =
               DBA_TABLESPACES.TABLESPACE_NAME);

第五步：删除之 把上述查询出来的语句贴到文本编辑里检查下（PS:这里会包含一个temp的临时表空间一定要去掉啊)

SQL> drop tablespace STAT_FTFY_CHRGSTAY_DTBS including contents and datafiles;

Tablespace dropped
SQL> drop tablespace STAT_FTFY_CHRGNEW_WIXTBS including contents and datafiles;

Tablespace dropped
SQL> drop tablespace STAT_FTFY_CHRGSMR_MIXTBS including contents and datafiles;

Tablespace dropped

最后去看下你的系统空间应该释放了吧