In the 1989 movie Batman, it was shown that the man who would become the Joker killed Bruce's parents.
Is this what happened in the official canon?
Did Batman ever get revenge on the person who killed his parents?
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The canonical answer is that Joe Chill killed them. Usually. I don't know of any stories where Batman got revenge on him.
I think the 1989 movie merged Joe Chill with the Joker because it made for a tighter story with fewer important characters. The Wikipedia article above claims that Joe Chill was originally slated to be the killer in the movie, as well, but they swapped in the Joker.