SELECT
b.COLUMN_NAME,b.DATA_TYPE,a.COMMENTS
FROM
USER_TAB_COLUMNS b,USER_COL_COMMENTS a
WHERE
b.TABLE_NAME = 'tabelName' AND b.TABLE_NAME = a.TABLE_NAME AND b.COLUMN_NAME = a.COLUMN_NAME
SELECT
b.COLUMN_NAME,b.DATA_TYPE,a.COMMENTS
FROM
USER_TAB_COLUMNS b,USER_COL_COMMENTS a
WHERE
b.TABLE_NAME = 'tabelName' AND b.TABLE_NAME = a.TABLE_NAME AND b.COLUMN_NAME = a.COLUMN_NAME