Can I use two connections in one router?

I have two internet connections at home which both get used, and I am planning on purchasing a new wifi router as well. What I wanted to know was is it possible to connect two internet connections into one router and make both the connections wifi? For this will only the router be sufficient or would I require something additional to the router?

I don't think you can use two connections in one router, I did try this some time ago and it didn't work for me, unless there is a way and I didn't know about it. What you could do is connect one connection to the router and one straight to the computer port.