本教程操作环境：Windows7系统、Oracle 11g版、Dell G3电脑。

oracle怎么查看表空间？

Oracle查看表空间及大小

--1、查看表空间的名称及大小 

ｓｅｌｅｃｔ t.tablespace_name, round(SUM(bytes / (1024 * 1024)), 0) ts_size FROM dba_tablespaces t, dba_data_files d WHERE t.tablespace_name = d.tablespace_name GROUP BY t.tablespace_name;

--2、查看表空间物理文件的名称及大小

ｓｅｌｅｃｔ tablespace_name, file_id, file_name, round(bytes / (1024 * 1024), 0) total_space FROM dba_data_files ORDER BY tablespace_name;

--3、查看回滚段名称及大小

ｓｅｌｅｃｔ segment_name, tablespace_name, r.status, (initial_extent / 1024) initialextent, (next_extent / 1024) nextextent, max_extents, v.curext curextent FROM dba_rollback_segs r, v$rollstat v WHERE r.segment_id = v.usn(+) ORDER BY segment_name;

--4、查看控制文件

ｓｅｌｅｃｔ NAME FROM v$controlfile;

--5、查看日志文件

ｓｅｌｅｃｔ MEMBER FROM v$logfile;

--6、查看表空间的使用情况

ｓｅｌｅｃｔ SUM(bytes) / (1024 * 1024) AS free_space, tablespace_name FROM dba_free_space GROUP BY tablespace_name; ｓｅｌｅｃｔ a.tablespace_name, a.bytes total, b.bytes used, c.bytes free, (b.bytes * 100) / a.bytes "% USED ", (c.bytes * 100) / a.bytes "% FREE " FROM sys.sm$ts_avail a, sys.sm$ts_used b, sys.sm$ts_free c WHERE a.tablespace_name = b.tablespace_name AND a.tablespace_name = c.tablespace_name;

--7、查看数据库库对象

ｓｅｌｅｃｔ owner, object_type, status, COUNT(*) count# FROM all_objects GROUP BY owner, object_type, status;

--8、查看数据库的版本　

ｓｅｌｅｃｔ version FROM product_component_version WHERE substr(product, 1, 6) = 'Oracle';

--9、查看数据库的创建日期和归档方式

ｓｅｌｅｃｔ created, log_mode, log_mode FROM v$database;  --1G=1024MB --1M=1024KB --1K=1024Bytes --1M=11048576Bytes --1G=1024*11048576Bytes=11313741824Bytes ｓｅｌｅｃｔ a.tablespace_name "表空间名", total "表空间大小", free "表空间剩余大小", (total - free) "表空间使用大小", total / (1024 * 1024 * 1024) "表空间大小(G)", free / (1024 * 1024 * 1024) "表空间剩余大小(G)", (total - free) / (1024 * 1024 * 1024) "表空间使用大小(G)", round((total - free) / total, 4) * 100 "使用率 %" FROM (ｓｅｌｅｃｔ tablespace_name, SUM(bytes) free FROM dba_free_space GROUP BY tablespace_name) a, (ｓｅｌｅｃｔ tablespace_name, SUM(bytes) total FROM dba_data_files GROUP BY tablespace_name) b WHERE a.tablespace_name = b.tablespace_name

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