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SQL code:

--±í結構
if exists (select * from dbo.sysobjects where id = object_id(N'[dbo].[tTable]') and OBJECTPROPERTY(id, N'IsUserTable') = 1)
drop table [dbo].[tTable]
GO

CREATE TABLE [dbo].[tTable] (
[fPFgCode] [varchar] (30) COLLATE Chinese_Taiwan_Stroke_CI_AS NOT NULL ,
[fFgCode] [varchar] (30) COLLATE Chinese_Taiwan_Stroke_CI_AS NOT NULL ,
[fup] [decimal](18, 2) NULL
) ON [PRIMARY]
GO

ALTER TABLE [dbo].[tTable] WITH NOCHECK ADD
CONSTRAINT [PK_tTable] PRIMARY KEY CLUSTERED
(
[fPFgCode],
[fFgCode]
) ON [PRIMARY]
GO



數據
fPfgCode fFgCode fup
A PA 100.00
A PB NULL
A PC 200.00
B PB NULL
B PC 200.00
C PA 100.00
C PC 200.00

結¹û
fPfgCode fFgCode
Ò²¾ÍÊÇÒÔfPfgCode·Ö組£¬當組ÓÐÈÎÒ»條記錄µÄfup為null,則´ËfPfgCodeÖ®ºÍ為0,·ñ則為SUMÖ®ºÍ

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A 0
B 0
C 300

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結¹ûÔõ麼ÅÜλÁË
fPfgCode fFgCode
A 0
B 0
C 300

---

SQL code:
select distinct fPfgCode,isnull(fup,0