Oracle : Query to find how much space can be reclaimed from each datafile
set linesize 1000 pagesize 0 feedback off trimspool onwithhwm as ( — get highest block id from each datafiles ( from x$ktfbue as we don’t need all joins from dba_extents ) select /*+ materialize */ ktfbuesegtsn ts#,ktfbuefno relative_fno,max(ktfbuebno+ktfbueblks-1) hwm_blocks from sys.x$ktfbue group by ktfbuefno,ktfbuesegtsn),hwmts as… Read More