select * from v$controlfile;
select * from v$logfile;
select tablespace_name ,status from dba_tablespaces;
select file_name,status from dba_data_files;
SELECT df.tablespace_name, COUNT (*) datafile_count,
ROUND (SUM (df.BYTES) / 1048576) size_mb,
ROUND (SUM (free.BYTES) / 1048576, 2) free_mb,
ROUND (SUM (df.BYTES) / 1048576 - SUM (free.BYTES) / 1048576, 2 ) used_mb,
ROUND (MAX (free.maxbytes) / 1048576, 2) maxfree,
100 - ROUND (100.0 * SUM (free.BYTES) / SUM (df.BYTES), 2) pct_used,
ROUND (100.0 * SUM (free.BYTES) / SUM (df.BYTES), 2) pct_free
FROM dba_data_files df,
(SELECT tablespace_name, file_id, SUM (BYTES) BYTES, MAX (BYTES) maxbytes FROM dba_free_space GROUP BY tablespace_name, file_id) free
WHERE df.tablespace_name = free.tablespace_name(+) AND df.file_id = free.file_id(+)
GROUP BY df.tablespace_name
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