oracle查看表空间及大小
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
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--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
高铁乘务员要求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$logfile;
--6、查看表空间的使⽤情况
SELECT SUM(bytes) / (1024 * 1024) AS free_space, tablespace_name
FROM dba_free_space
GROUP BY tablespace_name;
SELECT a.tablespace_name,
a.bytes total,
b.bytes used,
c.bytes free,
(b.bytes * 100) / a.bytes "% USED ",
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(c.bytes * 100) / a.bytes "% FREE "
FROM sys.sm$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#
教师节诗歌大全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
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--1M=1024KB
--1K=1024Bytes
--1M=11048576Bytes
--1G=1024*11048576Bytes=11313741824Bytes湖北旅游
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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