Submitted on: 10 January 2017.
Revised on: 26 January 2017.
Accepted on: 14 February 2017.
SIGMOD RECORD
http://reply.papertrans.cn/3/280/27960/27960-22.png
http://reply.papertrans.cn/3/280/27960/27960-23.png
Submitted on: 01 April 2007.
Revised on: 08 May 2007.
Accepted on: 23 May 2007.
SIGMOD RECORD
Submitted on: 16 November 2000.
Revised on: 29 November 2000.
Accepted on: 25 December 2000.
SIGMOD RECORD---ASSOC COMPUTING MACHINERY
http://reply.papertrans.cn/3/280/27960/27960-26.png
http://reply.papertrans.cn/3/280/27960/27960-27.png
http://reply.papertrans.cn/3/280/27960/27960-28.png
http://reply.papertrans.cn/3/280/27960/27960-29.png
Submitted on: 05 August 2009.
Revised on: 23 August 2009.
Accepted on: 16 September 2009.
SIGMOD RECORD