>Any way to make a view based on a UNION?
I don't know whether this is possible. But it occurs to me that if you need to update the underlying data, a re-design in the table structures might be better. When I had this need, it later turned out, for different reasons, that a different table structure was better. What is your specific need?
Difference in opinions hath cost many millions of lives: for instance, whether flesh be bread, or bread be flesh; whether whistling be a vice or a virtue; whether it be better to kiss a post, or throw it into the fire... (from Gulliver's Travels)