Yes and no. Yes you use execute as you have been told a few times already. No you do not add update into the query.

You added Update into the query and that does not go there.
You were shown what the sql statement should look like and there was no Update any where in any of that.

I said you execute just like you would an update query not that you should add update into it.

To execute any query you use execute, It doesn't matter it it is a drop statement, an alter statement or the ones you are more used to like update, delete, insert. They are all sql statements and they are all executed the same way the only thing that is different is the actual text of the statement.