@inproceedings{SIGMOD-2005-ChenN,
	author        = "Zhimin Chen and Vivek R. Narasayya",
	booktitle     = "{Proceedings of the 23rd ACM SIGMOD International Conference on Management of Data}",
	doi           = "10.1145/1066157.1066188",
	isbn          = "1-59593-060-4",
	pages         = "263--274",
	publisher     = "{ACM}",
	title         = "{Efficient Computation of Multiple Group By Queries}",
	year          = 2005,
}