oracle的分析函数学习

1. 讲解分析函数的  http://www.cnblogs.com/sunsonbaby/archive/2004/09/29/47876.aspx (讲解的不错)
2. row_number,rank,dense 区别 http://www.cnblogs.com/wuyisky/archive/2010/02/24/oracle_rank.html

用到的脚本在这里

create table t (BILL_MONTH varchar2(100),AREA_CODE varchar2(20),NET_TYPE varchar2(100),LOCAL_FARE number(17,2));

insert into fwork.t (bill_month, area_code, net_type, local_fare)values ('200405', '5761', 'G', 7393344.04);insert into fwork.t (bill_month, area_code, net_type, local_fare)values ('200405', '5761', 'J', 5667089.85);insert into fwork.t (bill_month, area_code, net_type, local_fare)values ('200405', '5762', 'G', 6315075.96);insert into fwork.t (bill_month, area_code, net_type, local_fare)values ('200405', '5762', 'J', 6328716.15);insert into fwork.t (bill_month, area_code, net_type, local_fare)values ('200405', '5763', 'G', 8861742.59);insert into fwork.t (bill_month, area_code, net_type, local_fare)values ('200405', '5763', 'J', 7788036.32);insert into fwork.t (bill_month, area_code, net_type, local_fare)values ('200405', '5764', 'G', 6028670.45);insert into fwork.t (bill_month, area_code, net_type, local_fare)values ('200405', '5764', 'J', 6459121.49);insert into fwork.t (bill_month, area_code, net_type, local_fare)values ('200405', '5765', 'G', 13156065.77);insert into fwork.t (bill_month, area_code, net_type, local_fare)values ('200405', '5765', 'J', 11901671.70);insert into fwork.t (bill_month, area_code, net_type, local_fare)values ('200406', '5761', 'G', 7614587.96);insert into fwork.t (bill_month, area_code, net_type, local_fare)values ('200406', '5761', 'J', 5704343.05);insert into fwork.t (bill_month, area_code, net_type, local_fare)values ('200406', '5762', 'G', 6556992.60);insert into fwork.t (bill_month, area_code, net_type, local_fare)values ('200406', '5762', 'J', 6238068.05);insert into fwork.t (bill_month, area_code, net_type, local_fare)values ('200406', '5763', 'G', 9130055.46);insert into fwork.t (bill_month, area_code, net_type, local_fare)values ('200406', '5763', 'J', 7990460.25);insert into fwork.t (bill_month, area_code, net_type, local_fare)values ('200406', '5764', 'G', 6387706.01);insert into fwork.t (bill_month, area_code, net_type, local_fare)values ('200406', '5764', 'J', 6907481.66);insert into fwork.t (bill_month, area_code, net_type, local_fare)values ('200406', '5765', 'G', 13562968.81);insert into fwork.t (bill_month, area_code, net_type, local_fare)values ('200406', '5765', 'J', 12495492.50);insert into fwork.t (bill_month, area_code, net_type, local_fare)values ('200407', '5761', 'G', 7987050.65);insert into fwork.t (bill_month, area_code, net_type, local_fare)values ('200407', '5761', 'J', 5723215.28);insert into fwork.t (bill_month, area_code, net_type, local_fare)values ('200407', '5762', 'G', 6833096.68);insert into fwork.t (bill_month, area_code, net_type, local_fare)values ('200407', '5762', 'J', 6391201.44);insert into fwork.t (bill_month, area_code, net_type, local_fare)values ('200407', '5763', 'G', 9410815.91);insert into fwork.t (bill_month, area_code, net_type, local_fare)values ('200407', '5763', 'J', 8076677.41);insert into fwork.t (bill_month, area_code, net_type, local_fare)values ('200407', '5764', 'G', 6456433.23);insert into fwork.t (bill_month, area_code, net_type, local_fare)values ('200407', '5764', 'J', 6987660.53);insert into fwork.t (bill_month, area_code, net_type, local_fare)values ('200407', '5765', 'G', 14000101.20);insert into fwork.t (bill_month, area_code, net_type, local_fare)values ('200407', '5765', 'J', 12301780.20);insert into fwork.t (bill_month, area_code, net_type, local_fare)values ('200408', '5761', 'G', 8085170.84);insert into fwork.t (bill_month, area_code, net_type, local_fare)values ('200408', '5761', 'J', 6050611.37);insert into fwork.t (bill_month, area_code, net_type, local_fare)values ('200408', '5762', 'G', 6854584.22);insert into fwork.t (bill_month, area_code, net_type, local_fare)values ('200408', '5762', 'J', 6521884.50);insert into fwork.t (bill_month, area_code, net_type, local_fare)values ('200408', '5763', 'G', 9468707.65);insert into fwork.t (bill_month, area_code, net_type, local_fare)values ('200408', '5763', 'J', 8460049.43);insert into fwork.t (bill_month, area_code, net_type, local_fare)values ('200408', '5764', 'G', 6587559.23);insert into fwork.t (bill_month, area_code, net_type, local_fare)values ('200408', '5764', 'J', 7342135.86);insert into fwork.t (bill_month, area_code, net_type, local_fare)values ('200408', '5765', 'G', 14450586.63);insert into fwork.t (bill_month, area_code, net_type, local_fare)values ('200408', '5765', 'J', 12680052.38);