dba_tablespace_usage_metrics used per cent does not correspond with dba_free_space

I think I'm wrong, but don't know what the problem, please let know us, thanks.
(* to the person who has always responded with docs: do not ask me to check the docs, the metric is the number of blocks and the dba_free_space is bytes, but the are used must be the same, they must? *)

When select * from dba_tablespace_usage_metrics by used_percent desc
NOM_TABLESPACE USED_SPACE TABLESPACE_SIZE USED_PERCENT
XYZ 6973302 12386302 * 56.2984981*
If I use
SELECT / * + RULE * / df.tablespace_name "Tablespace"
DF.bytes 2 / (1024 * 1024) "size (MB)",.
"" SUM (fs.bytes) 3 / (1024 * 1024) "free (MB).
NVL (Round (SUM (fs.bytes) 4 * 100 / df.bytes), 1) "% free"
5 round ((df.bytes - SUM (fs.bytes)) * 100/df.bytes) "% used (s)".
6 OF dba_free_space fs,
7 (SELECT tablespace_name, SUM (bytes) bytes
8 FROM dba_data_files
9 GROUP BY nom_tablespace) df
10. WHERE fs.tablespace_name (+) = df.tablespace_name
11 GROUP BY df.tablespace_name, df.bytes
I get
Tablespace size (MB) free (MB) % free used
XYZ 56293.9844 1815,0625 3 * 97 *.

I think I'm wrong, but don't know what the problem, please let know us, thanks.
(* to the person who has always responded with docs: do not ask me to check the docs, the metric is the number of blocks and the dba_free_space is bytes, but the are used)

It's data files are CANGROW ?

Select file_name, bytes/1024/1024, maxbytes/1024/1024, user_bytes/1024/1024 CanGrow form dba_data_files where nom_tablespace ='&TBS';

Tags: Database

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