I don't understand the reply with the code and if it results in 0. I just want to know how to use placeholders in my code above in order...

If Linda changes her name, couldn't you just query her name and update the table with an update statement?

if i was describing lets say classes and students where each student can be in more than one class and each class can have multiple students. Or how about just...

This helps a lot, thank you everyone!

But if you set multiple columns as primary keys so if you are entering something new the server will tell you if its duplicated, wouldn't that be ok?

I'm sorry, I'm...