zbb20170816 oracle Oracle 查看表空间、数据文件的大小及使用情况sql语句

 oracle Oracle 查看表空间、数据文件的大小及使用情况sql语句

--表空间

--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;

--数据文件

select 　　b.file_name 物理文件名,
       　　b.tablespace_name 表空间,
       　　b.bytes / 1024 / 1024 大小M,
       　　(b.bytes - sum(nvl(a.bytes, 0))) / 1024 / 1024 已使用M,
       　　substr((b.bytes - sum(nvl(a.bytes, 0))) / (b.bytes) * 100, 1, 5) 利用率 　　from dba_free_space a,
       dba_data_files b 　　where a.file_id = b.file_id 　　group by b.tablespace_name,
       b.file_name,
       b.bytes 　　order by b.tablespace_name;
       
       
       
       


--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;