DB2: to see the pages in tables per tablespace

 select

   npages,

   fpages,
   rtrim(tabschema) || '.' || tabname
from
   syscat.tables
where 
   tbspace = 'TAB8K'


For example, an output like:
             6149643              6752845 WCS.STAGLOG_ARCHIVE   

fpage, no of pages with data in them
npage, no of pages assigned to table

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