查询表空间使用情况

SELECT UPPER(F.TABLESPACE_NAME) "表空间名",
  D.TOT_GROOTTE_MB "表空间大小(M)",
  D.TOT_GROOTTE_MB - F.TOTAL_BYTES "已使用空间(M)",
  TO_CHAR(ROUND((D.TOT_GROOTTE_MB-F.TOTAL_BYTES)/D.TOT_GROOTTE_MB*100,2),'990.99') "使用比",
  F.TOTAL_BYTES "空闲空间(M)",
  F.MAX_BYTES "最大块(M)"
FROM (SELECT TABLESPACE_NAME,
        ROUND(SUM(BYTES) / (1024 * 1024), 2) TOTAL_BYTES,
        ROUND(MAX(BYTES) / (1024 * 1024), 2) MAX_BYTES
      FROM SYS.DBA_FREE_SPACE
      GROUP BY TABLESPACE_NAME) F,
      (SELECT DD.TABLESPACE_NAME,
         ROUND(SUM(DD.BYTES) / (1024 * 1024), 2) TOT_GROOTTE_MB
      FROM SYS.DBA_DATA_FILES DD
      GROUP BY DD.TABLESPACE_NAME) D
 WHERE D.TABLESPACE_NAME = F.TABLESPACE_NAME
 ORDER BY 4 DESC;

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查看表空间是否具有自动扩展的能力

 SELECT T.TABLESPACE_NAME,
       D.FILE_NAME,
       D.AUTOEXTENSIBLE,
       D.BYTES,
       D.MAXBYTES,
       D.STATUS
  FROM DBA_TABLESPACES T, DBA_DATA_FILES D
 WHERE T.TABLESPACE_NAME = D.TABLESPACE_NAME
 ORDER BY TABLESPACE_NAME, FILE_NAME;

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?修改表空间文件扩展方式:???

ALTER DATABASE DATAFILE 'D:\ORACLE\ORADATA\ORCL\ORCL_DATA.DBF' AUTOEXTEND    
ON NEXT 50M MAXSIZE UNLIMITED 

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'D:\ORACLE\ORADATA\ORCL\ORCL_DATA.DBF'? 是第二步中的FILE_NAME