Using SQL check the table sizes in DB2 Database

SELECT SUBSTR(TABSCHEMA,1,18) TABSCHEMA,
SUBSTR(TABNAME,1,30) TABNAME,
(DATA_OBJECT_P_SIZE + INDEX_OBJECT_P_SIZE + LONG_OBJECT_P_SIZE + LOB_OBJECT_P_SIZE + XML_OBJECT_P_SIZE) AS TOTAL_SIZE_IN_KB,
(DATA_OBJECT_P_SIZE + INDEX_OBJECT_P_SIZE + LONG_OBJECT_P_SIZE + LOB_OBJECT_P_SIZE + XML_OBJECT_P_SIZE)/1024 AS TOTAL_SIZE_IN_MB, 
(DATA_OBJECT_P_SIZE + INDEX_OBJECT_P_SIZE + LONG_OBJECT_P_SIZE + LOB_OBJECT_P_SIZE + XML_OBJECT_P_SIZE) / (1024*1024) AS TOTAL_SIZE_IN_GB 
FROM SYSIBMADM.ADMINTABINFO WHERE TABSCHEMA NOT LIKE 'SYS%'
order by 3 desc;