Oracle删除、查看表空间及数据⽂件⽅法1、查⼯作空间的路径
select * from dba_data_files;
2、删除⽤户,及级联关系也删除掉
drop user  ⽤户名 cascade;
3、删除表空间,及对应的表空间⽂件也删除掉
drop tablespace 表空间名including contents and datafiles cascade constraint;
4、删除表空间
--删除空的表空间,但是不包含物理⽂件
drop tablespace tablespace_name;
--删除⾮空表空间,但是不包含物理⽂件
drop tablespace tablespace_name including contents;
-
-删除空表空间,包含物理⽂件
drop tablespace tablespace_name including datafiles;
--删除⾮空表空间,包含物理⽂件
drop tablespace tablespace_name including contents and datafiles;
--如果其他表空间中的表有外键等约束关联到了本表空间中的表的字段,就要加上CASCADE CONSTRAINTS
drop tablespace tablespace_name including contents and datafiles CASCADE CONSTRAINTS;
5、删除⽆任何数据对象的表空间
(1)、登录⽤户,确认当前⽤户是否有删除表空间的权限,如果没有使⽤更⾼级的⽤户登录
oracle数据库怎么查询表drop tablespace xxx ,删除需要删除的表空间。
6、删除有任何数据对象的表空间
drop tablespace xxx including contents and datafiles;
注意事项:
如果drop tablespace语句中含有datafiles,那datafiles之前必须有contents关键字,不然会提⽰ora-01911错误
7、查看表空间容量
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;
8、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;
9、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$rollstat v
WHERE r.segment_id = v.usn(+)
ORDER BY segment_name;
10、查看控制⽂件
SELECT NAME FROM v$controlfile;
11、查看⽇志⽂件
SELECT MEMBER FROM v$logfile;
12、查看表空间的使⽤情况
SELECT SUM(bytes) / (1024 * 1024) AS free_space, tablespace_name
FROM dba_free_space
GROUP BY tablespace_name;
SELECT a.tablespace_name,
a.bytes total,
b.bytes used,
c.bytes free,
(b.bytes * 100) / a.bytes "% USED ",
(c.bytes * 100) / a.bytes "% FREE "
FROM sys.sm$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;
13、查看数据库库对象
SELECT owner, object_type, status, COUNT(*) count# FROM all_objects
GROUP BY owner, object_type, status;
14、查看数据库的版本
SELECT version
FROM product_component_version
WHERE substr(product, 1, 6) = 'Oracle';
15、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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