Below sql query is used to find total tablespace size of your database. which includes Tablespace name used size in MB, free size in MB and Total size in MB
Sql command which fetch tablesapce size in GB Click here to get sample output
select d.tablespace_name "Tablespace", totalusedspace "Used MB", (d.totalspace - s.totalusedspace) "Free MB", d.totalspace "Total MB", round(100 * ( (d.totalspace - s.totalusedspace)/ d.totalspace)) "Pct. Free" from (select tablespace_name, round(sum(bytes) / 1048576) TotalSpace from dba_data_files group by tablespace_name) d, (select round(sum(bytes)/(1024*1024)) totalusedspace, tablespace_name from dba_segments group by tablespace_name) s where d.tablespace_name = s.tablespace_name ;
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