select t.DATA_PRECISION,t.DATA_SCALE,t.DATA_LENGTH,t.DATA_TYPE,t.COLUMN_NAME, t.NULLABLE,t.DATA_DEFAULT,c.COMMENTS

from all_tab_columns t left join all_col_comments c

on t.table_name = c.table_name and t.column_name = c.column_name

where t.table_name = 'TEST2'

order by t.COLUMN_ID