The ideal situation would be to record the songs in one take. Reality is usually a little different. You have basically two methods for combining different takes to one "master take." Using a tempo map is essential with these methods, as it allows you to see the grid.

If the drums have pauses during the song, you can quite easily record the song in a few different passes. Another method would be to record the song many times from the start to the end until you have enough takes to choose from. Just decide the best overall take and find the errors. Copy/paste the needed parts from the other takes. Some DAW's have great features for "take management." Pro Tools has Playlists and Cubase has Lanes.

When you combine the takes, getting the cymbals right is the most difficult part. The decay is longer than in any other part of the kit and the sound is different every time the drummer hits cymbals. Sometimes longer crossfades help. The best spot to merge the tracks is usually right before a snare hit.