أنشئ حسابًا أو سجّل الدخول للانضمام إلى مجتمعك المهني.
if the tablespace have free space and you need to reduce the size of it you can use the following command:
ALTER TABLESPACE TABLESPACE_NAME RESIZE 40G; (for example)
or you can shrink table space size as the following:
ALTER TABLESPACE TABLESPACE_NAME SHRINK SPACE;