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

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--查看表空间是否具有自动扩展的能力
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SELECT T.TABLESPACE_NAME,D.FILE_NAME,
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D.AUTOEXTENSIBLE,D.BYTES,D.MAXBYTES,D.STATUS
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FROM DBA_TABLESPACES T,DBA_DATA_FILES D
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WHERE T.TABLESPACE_NAME =D.TABLESPACE_NAME
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 ORDER BY TABLESPACE_NAME,FILE_NAME;