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Show extents that need to be resized

This script should be run from SQL*plus prompt. This can also be placed in a file and ran from the SQL*plus prompt. 

 

SELECT segment_name, 

       segment_type, 

       tablespace_name, 

       sum(bytes)/1024 kbytes, 

       count(segment_name) 

FROM user_extents
GROUP BY segment_name, segment_type, tablespace_name
HAVING COUNT(*) > 2
/