http://www.cnblogs.com/warioland/archive/2012/05/30/2526128.html
如何用distinct消除重复记录的同时又能选取多个字段值？
转载于:https://www.cnblogs.com/longshiyVip/p/6038244.html
http://www.cnblogs.com/warioland/archive/2012/05/30/2526128.html
转载于:https://www.cnblogs.com/longshiyVip/p/6038244.html