调试数据如下(for SQL2005+)：
--预订表(编号，产品型号，预订日期，预订数量)
CREATE TABLE Forecast(ID varchar(25), PartNumber varchar(25), BOM varchar(25), BeginDate smalldatetime, QtyCurrent decimal(14,4));
INSERT INTO Forecast VALUES('FO01','Part01','BOM01','2014-7-1',0);
INSERT INTO Forecast VALUES('FO01','Part01','BOM01','2014-8-1',1000);
INSERT INTO Forecast VALUES('FO01','Part01','BOM01','2014-9-1',2000);
INSERT INTO Forecast VALUES('FO01','Part01','BOM01','2014-10-1',3500);
INSERT INTO Forecast VALUES('FO01','Part02','BOM02','2014-7-1',1200);
INSERT INTO Forecast VALUES('FO01','Part02','BOM02','2014-8-1',1800);
INSERT INTO Forecast VALUES('FO01','Part02','BOM02','2014-9-1',2500);
INSERT INTO Forecast VALUES('FO01','Part02','BOM02','2014-10-1',0);
GO
--预订区间数据表(编号，预订日期，显示标题)
CREATE TABLE ForecastOrderArea(ID varchar(25), BeginDate smalldatetime, Caption varchar(20));
INSERT INTO ForecastOrderArea VALUES('FO01','2014-7-1','JAL');
INSERT INTO ForecastOrderArea VALUES('FO01','2014-8-1','AUG');
INSERT INTO ForecastOrderArea VALUES('FO01','2014-9-1','SEP');
INSERT INTO ForecastOrderArea VALUES('FO01','2014-10-1','OCT');
INSERT INTO ForecastOrderArea VALUES('FO02','2014-7-1','JAL');
INSERT INTO ForecastOrderArea VALUES('FO02','2014-8-1','AUG');
INSERT INTO ForecastOrderArea VALUES('FO02','2014-9-1','SEP');
INSERT INTO ForecastOrderArea VALUES('FO02','2014-10-1','OCT');
GO
--预订BOM(编号，产品型号)
CREATE TABLE PartBOMMaster(ID varchar(25), PartNumber varchar(25));
INSERT INTO PartBOMMaster VALUES('BOM01','Part01');
INSERT INTO PartBOMMaster VALUES('BOM02','Part02');
GO
--预订BOM明细(编号，元件编码,数量)
CREATE TABLE PartBOMDetail(ID varchar(25), ComponentId varchar(25), Qty decimal(6,3));
INSERT INTO PartBOMDetail VALUES('BOM01','CAP01',3);
INSERT INTO PartBOMDetail VALUES('BOM01','CAP02',1);
INSERT INTO PartBOMDetail VALUES('BOM01','RES01',2);
INSERT INTO PartBOMDetail VALUES('BOM01','RES02',1);
INSERT INTO PartBOMDetail VALUES('BOM02','DIO01',3);
INSERT INTO PartBOMDetail VALUES('BOM02','CAP02',1);
INSERT INTO PartBOMDetail VALUES('BOM02','RES02',1);
INSERT INTO PartBOMDetail VALUES('BOM02','CAP01',1);
GO
需要统计出以下主从数据表：
--1. Master
ID PartNumber BOM JAL AUG SEP OCT
FO01 Part01 BOM01 0 3000 6000 3500
FO02 Part02 BOM02 1200 1800 2500 0
--2. Detail(单个)
ID Component JAL AUG SEP OCT
FO01 CAP01 0 3000 6000 10500
FO01 CAP02 0 1000 2000 3500
FO01 RES01 0 2400 4000 7000
FO01 RES02 0 1000 2000 3500
FO02 DIO01 3600 5400 7500 0
FO02 CAP01 1200 1800 2500 0
FO02 CAP02 1200 1800 2500 0
FO02 RES02 1200 1800 2500 0
--3. Detail(多个统计: FO01, FO02)
S_Id Component JAL AUG SEP OCT
1 CAP01 1200 4800 8500 10500
2 CAP02 1200 2800 4500 3500
3 DIO01 3600 5400 7500 0
4 RES01 0 2400 4000 7000
5 RES02 1200 2800 4500 3500
难点：
需按ForecastOrderArea的Caption 将Forecast表中的QtyCurrent横向显示出来；
BOM数据也需要向每月的需求数量横向显示出来(PartBOMDetail.Qty * Forecast.QtyCurrent)
