Can this be done?

I need to populate a database (Oracle based) with data from Excel but to get
data into this database it involves rightclicking the column heading followed
by tab keys to enter data. I have checked to see if the 'right click' key on
the keyboard works -it doesn't - nor can any other key on the keyboard
replicate a right mouse click.

I know I can use sendkeys for the tabs but is there a sendkeys statement to
produce the equivalent of this right clicking of the column heading?