Correct me if im wrong, if a switch has 4 SFP slots, they are meant to have fiber in correct. Also how would that work, can anyone give me a brief explanation.
Usually, yes, however, there are various SFP's that you can buy, single mode fiber, multi-mode fiber, GigE copper and 10/100 Copper (as well as 10/100 fiber as well). SFP's give you the ability to add whatever type of interconnect you need, provided that you switch supports the SFP that you want to put in it. Most switch vendors lock the SFP ports to work with ONLY SFP's that are made by the switch vendor.
and saw that it was SFP in, and was wondering if i would have to opt for a different switch if i couldn't go with Fiber in,or would i be able to get an attachment for it so i can use an Ethernet cable