Connected to Oracle Database 11g Enterprise Edition Release  11 . 1 . 0 . 7 . 0  
Connected as xxx
 
SQL> column data_type format a10
SQL> select COLUMN_NAME, DATA_TYPE from all_tab_columns
   2    where owner = 'APEX_030200'
   3      and table_name = 'APEX_APPLICATION_PAGE_REGIONS'
   4      and column_name = 'REGION_SOURCE';
 
COLUMN_NAME                    DATA_TYPE
------------------------------ ----------
REGION_SOURCE                  CLOB
 
SQL>