日期:2014-05-16 浏览次数:20736 次
-- PostgreSQL V9.04 create table managecard ( id serial, managecard char(18) not null ); insert into managecard(managecard) values ('207999900100000020'); insert into managecard(managecard) values ('207999900100000021'); insert into managecard(managecard) values ('207999900100000022'); create table trans ( id serial, card char(18) not NULl, transtype char(10) not null, transtime char(6) ); insert into trans (card, transtype, transtime ) values ('207999900100000026', '消费', '050000'); insert into trans (card, transtype, transtime ) values ('207999900100000020', '消费', '050100'); insert into trans (card, transtype, transtime ) values ('207999900100000023', '存款', '050200'); insert into trans (card, transtype, transtime ) values ('207999900100000024', '积分消费', '050300'); insert into trans (card, transtype, transtime ) values ('207999900100000022', '启用', '050400'); insert into trans (card, transtype, transtime ) values ('207999900100000026', '消费', '050500'); insert into trans (card, transtype, transtime ) values ('207999900100000023', '积分消费', '050600'); insert into trans (card, transtype, transtime ) values ('207999900100000021', '消费', '050700'); insert into trans (card, transtype, transtime ) values ('207999900100000020', '积分消费', '050800'); insert into trans (card, transtype, transtime ) values ('207999900100000021', '消费', '050900'); insert into trans (card, transtype, transtime ) values ('207999900100000023', '启用', '051000'); /* 过程: 从trans表第一条记录a开始,如果a的卡号在managecard表中存在,则此条数据其后 的各条数据的卡号都记录在a的卡号旗下,直到遇到下一条卡号在managecard中存在的记录b b记录其后的各条数据的卡号都记录在b的卡号旗下,直到遇到下一条卡号在managecard中存在的数据记录c..., 如此往复。 根据以上数据及需求得出的结果应该是: managecard card transtype transtime ------------------------------- 207999900100000020 207999900100000023 存款 050200 207999900100000020 207999900100000024 积分消费 050300 207999900100000022 207999900100000026 消费 050500 207999900100000022 207999900100000023 积分消费 050600 207999900100000021 207999900100000023 启用 051000 */