same table_name with different owners

Hi,
I need some suggestions on these.
I need a efficient way to manage many ( over 100) table which have the same table_name but different owners.
Everytime when I need to alter the tables. I need to alter the individual table one by one. Sometimes I may miss one or two. Is there a way to:
1. check if a column exists in the all tables ( I don't want to desc a table at a time)
2. alter all tables with the same table_name but different owner.

Thanks
K.C. Received on Mon Nov 17 1997 - 00:00:00 CST