oracle - 如何从单个查询中获取所有表空间名称、分配大小、可用大小、容量？

Question

如何以以下格式获取有关数据库中所有表空间的信息。

TABLESPACE_NAME | FILE_NAME |  ALLOCATED_MB  | FREE_MB |  CAPACITY |

有没有办法自动将所有表空间的每日大小存储在另一个表中？实际上，我需要每天准备有关表空间的清单。所以我不想创建前端，它会根据每天存储有关表空间大小信息的表自动向我发送表空间大小详细信息。

Answer 1

尝试以下查询以获取 oracle 中的所有表空间详细信息。假设您具有访问 dba 表的必要权限。

SELECT a.file_name,
       substr(A.tablespace_name,1,14) tablespace_name,
       trunc(decode(A.autoextensible,'YES',A.MAXSIZE-A.bytes+b.free,'NO',b.free)/1024/1024) free_mb,
       trunc(a.bytes/1024/1024) allocated_mb,
       trunc(A.MAXSIZE/1024/1024) capacity,
       a.autoextensible ae
FROM (
     SELECT file_id, file_name,
            tablespace_name,
            autoextensible,
            bytes,
            decode(autoextensible,'YES',maxbytes,bytes) maxsize
     FROM   dba_data_files
     GROUP BY file_id, file_name,
              tablespace_name,
              autoextensible,
              bytes,
              decode(autoextensible,'YES',maxbytes,bytes)
     ) a,
     (SELECT file_id,
             tablespace_name,
             sum(bytes) free
      FROM   dba_free_space
      GROUP BY file_id,
               tablespace_name
      ) b
WHERE a.file_id=b.file_id(+)
AND A.tablespace_name=b.tablespace_name(+)
ORDER BY A.tablespace_name ASC; 

Answer 2

Select a.tablespace_name,a.file_name,a.bytes/1024/1024 TABLESPACE_SIZE_MB,
Sum(b.bytes)/1024/1024 FREE_IN_MB from dba_free_space b,dba_data_files a
Where a.tablespace_name = b.tablespace_name
AND a.file_id = b.file_id
GROUP by a.tablespace_name, a.file_name,a.bytes/1024/1024
Order by a.tablespace_name, a.file_name;

您可以运行此查询，这可能会有所帮助。

Answer 3

在 Oracle 中，请参考以下链接：

如何在 Oracle 中计算表大小

https://forums.oracle.com/thread/2160787

COLUMN TABLE_NAME FORMAT A32
COLUMN OBJECT_NAME FORMAT A32
COLUMN OWNER FORMAT A10

SELECT
   owner, table_name, TRUNC(sum(bytes)/1024/1024) Meg
FROM
(SELECT segment_name table_name, owner, bytes
 FROM dba_segments
 WHERE segment_type = 'TABLE'
 UNION ALL
 SELECT i.table_name, i.owner, s.bytes
 FROM dba_indexes i, dba_segments s
 WHERE s.segment_name = i.index_name
 AND   s.owner = i.owner
 AND   s.segment_type = 'INDEX'
 UNION ALL
 SELECT l.table_name, l.owner, s.bytes
 FROM dba_lobs l, dba_segments s
 WHERE s.segment_name = l.segment_name
 AND   s.owner = l.owner
 AND   s.segment_type = 'LOBSEGMENT'
 UNION ALL
 SELECT l.table_name, l.owner, s.bytes
 FROM dba_lobs l, dba_segments s
 WHERE s.segment_name = l.index_name
 AND   s.owner = l.owner
 AND   s.segment_type = 'LOBINDEX')
WHERE owner in UPPER('&owner')
GROUP BY table_name, owner
HAVING SUM(bytes)/1024/1024 > 10  /* Ignore really small tables */
ORDER BY SUM(bytes) desc
;

在SQL中参考下面

获取数据库中所有表的大小

Answer 4

以上有用。希望这在这里也有帮助：

https://ora-data.blogspot.in/2016/12/how-to-find-details-of-tablespace.html

用不同的命令检查表空间的详细信息，上面的命令可能不起作用：

SQL>select round((bytes/1024)/1024,0) "Used Space(MB)",
round(total,0) "Allocated size(MB)",
round(max,0) "Maximum allowable(MB)",
round(max-(BYTES/1024)/1024,0) "Effective free(MB)",
round(((max-(BYTES/1024)/1024)/max)*100,2) "FREE(%)"
from SYS.SM$TS_USED,
(select sum((BYTES/1024)/1024) total, sum((decode(MAXBYTES,0,bytes,maxbytes)/1024)/1024) max
from dba_data_files where tablespace_name='&1') where tablespace_name='&1';