sth->do()

Hi All,

I need to issue commands such as ("CREATE TABLE", "DROP TABLE", "ALTER
TABLE", etc...), however, whenever I use sth->do($sqlString), I get an
error. I understand that using sth->do(), it goes through the process
of prepare and execute. With that, it is expecting a returned value.

Can someone advise as to the best way to execute commands that does not
require return values?

Thanks.

Peter