This may be a silly question...

[Daisie23*]

I am very new at this and this may seem like a silly question. I have always just bought my wine by the glass at a restaurant or if i do buy a bottle it is usually consumed before the end of the evening and have never had to encounter this...is it possible to reseal the wine bottle after it has been opened and have the wine still taste good? I would greatly appreciate your help!