Oracle 查看表空间的大小及使用情况sql语句（oracle 如何查看表空间）深度揭秘

–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;