查看ORACLE表空间情况SQL

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1、查看所有表空间信息

select a.tablespace_name,
       round(a.bytes_alloc / 1024 / 1024, 2) megs_alloc,
       round(nvl(b.bytes_free, 0) / 1024 / 1024, 2) megs_free,
       round((a.bytes_alloc - nvl(b.bytes_free, 0)) / 1024 / 1024, 2) megs_used,
       round((nvl(b.bytes_free, 0) / a.bytes_alloc) * 100,2) Pct_Free,
       100 - round((nvl(b.bytes_free, 0) / a.bytes_alloc) * 100,2) Pct_used,
       round(maxbytes/1048576,2) Max
from ( select f.tablespace_name,
               sum(f.bytes) bytes_alloc,
               sum(decode(f.autoextensible, 'YES',f.maxbytes,'NO', f.bytes)) maxbytes
        from dba_data_files f
        group by tablespace_name) a,
      ( select f.tablespace_name,
               sum(f.bytes) bytes_free
        from dba_free_space f
        group by tablespace_name) b
where a.tablespace_name = b.tablespace_name (+)
union all
select h.tablespace_name,
       round(sum(h.bytes_free + h.bytes_used) / 1048576, 2) megs_alloc,
       round(sum((h.bytes_free + h.bytes_used) - nvl(p.bytes_used, 0)) / 1048576, 2) megs_free,
       round(sum(nvl(p.bytes_used, 0))/ 1048576, 2) megs_used,
       round((sum((h.bytes_free + h.bytes_used) - nvl(p.bytes_used, 0)) / sum(h.bytes_used + h.bytes_free)) * 100,2) Pct_Free,
       100 - round((sum((h.bytes_free + h.bytes_used) - nvl(p.bytes_used, 0)) / sum(h.bytes_used + h.bytes_free)) * 100,2) pct_used,
       round(sum(f.maxbytes) / 1048576, 2) max
from   sys.v_$TEMP_SPACE_HEADER h, sys.v_$Temp_extent_pool p, dba_temp_files f
where p.file_id(+) = h.file_id
and    p.tablespace_name(+) = h.tablespace_name
and    f.file_id = h.file_id
and    f.tablespace_name = h.tablespace_name
group by h.tablespace_name
ORDER BY 1

;

2、查看指定表空间详细信息：

Select file_name, BYTES, blocks, autoextensible,
nvl(increment_by, 0) increment_by, maxbytes, maxblocks, status, maxblocks maxextend, file_id
from sys.dba_data_files
where TABLESPACE_NAME=:Tname
Tname = 'USERS'

;