same field from INNER JOIN tables

Hi,

I have to tables T1 and T2. Field F1 exists in both tables with the same name. I use the following statement to populate internal table. Some data is from T1 and the rest comes from T2. As to filed F1, sometimes T2-F1 is initial and T1-F1 is always filled. F1 of the internal table should come from T1. How can I optimize my code to retrieve the correct data rather than list every fields after SELECT? There are so many fields to populate so I want to use SELECT * rather than to list each of them.

SELECT *

     INTO CORRESPONDING TABLE OF lt_tab

   FROM T1 INNER JOIN T2 ON ... .

Thanks,

ts