That depends on SOOO many things.
A single stab wound could kill you (consider that slashing the wrist is a common means to commit suicide). On the other hand, if none of the wounds cause excessive bleeding, a day in the hospital could be enough (for stitches).
If you are bleeding, the severity of your condition depends on how quickly your wounds are treated.
If the bullet is lodged in your body and contains lead, it could cause lead poisoning.
There is also a unique condition where a gun shot could cause a shock through your bloodstream which causes brain damage.
Damage to bones and muscles could also lengthen your stay.

