Creating a FUNCTION where table names can vary?

[AJ M]

Say in my function I have the following line:

update TABLENAME set roc = day40/6 where id=counter;

The thing is is that tablename can refer to many different tables, hence in the function call I want to be able to pass the value as a character

For example, if i go myfunction("A");

I want it to do update A set roc = day40/6 where id=counter;

If I call myfunction("B");

I want it to do update B set roc = day40/6 where id=counter;


Is there a way to create a function whereby I can pass it the name of my table as a paramter and have it substitute the name of the table in the select, insert, update, etc.... statements?