-- Partitions of a table
SELECT TABLE_OWNER, TABLE_NAME, PARTITION_NAME, SUBPARTITION_COUNT, 
       HIGH_VALUE, PCT_USED, NUM_ROWS, LAST_ANALYZED
FROM DBA_TAB_PARTITIONS
WHERE TABLE_OWNER = 'MY_OWNER'
  AND TABLE_NAME = 'MY_TABLE';
-- Subpartitions of a table
SELECT TABLE_OWNER, TABLE_NAME, PARTITION_NAME, SUBPARTITION_NAME, 
       HIGH_VALUE, PCT_USED, NUM_ROWS, LAST_ANALYZED
FROM DBA_TAB_SUBPARTITIONS
WHERE TABLE_OWNER = 'MY_OWNER'
  AND TABLE_NAME = 'MY_TABLE';