å设表1为table1 ï¼è¡¨2为table2 select a.col from (select column_name col from user_tab_columns where table_name = 'table1') a , (select column_name col from user_tab_columns where table_name = 'table2') b where a.col = b.col è¿æ ·å°±å¯ä»¥æ¥è¯¢åºä¸¤ä¸ªè¡¨å¾ç¸åå段äº