oracle table size under schema code example

Example: oracle size of tables in schema

-- Oracle: Size of a table in a tablespace
SELECT
    e.owner,
    e.segment_name,
    e.tablespace_name,
    SUM(e.bytes) / 1048576 megs
FROM dba_extents e
WHERE
    e.owner = 'xxMY_OWNERxx'
    AND e.tablespace_name = 'xxMY_TBSxx'
    AND e.segment_name = 'xxMY_TABLExx'
GROUP BY e.owner, e.segment_name, e.tablespace_name
ORDER BY
    e.tablespace_name,
    e.segment_name;