My parents own four dachshunds, my brother owns two.
They are by far one of the hardest dogs to house train.

I just doggy sat my brother's two dogs this weekend.

One bad thing about dachshunds is that they pee when they get excited. In fact this weekend one of the dogs jumped on our bed and wet my pillow at 5am.

The best method is crate training. Atleast that's how we got our boxer to go outside. You have to be persistent. My dog did NOT like the crate. In fact he still doesn't, but he got used to it and now he alerts us when he needs to go outside. No more crate for him. Now if only I could keep a 70lb dog from jumping on people.