摘要：
---行列转换create table m ( matid int, qty int, lid int)insert into m values(10011,1,101);insert into m values(20012,2,102);insert into m values(10011,2,102);insert into m values(10011,1,102);create table l( lid int, name varchar(20))insert into l values(101,'北京');insert into l values(102... 阅读全文
