Implementation of the parallel GroupBy and Aggregation functions in a distributed database system
XU Shi-lei, WEI Xing, JIANG Hong, QIAN Wei-ning, ZHOU Ao-ying
Journal of East China Normal University(Natural Science) . 2018, (5): 56 -66 .  DOI: 10.3969/j.issn.1000-5641.2018.05.005