DCOUNT مقابل SQL SELECT COUNT (*)؟

Question

واني اسعى الى الحصول على عدد من جميع العناصر المرسلة إلى المورد بناء على أمر الشراء تكليفهم بالعمل. لكنني لا يمكن أن يبدو للحصول على التحكم لتظهر عددا من البنود على أساس المثال أمر الشراء - فإنه يحتفظ رمي إما # NAME؟ أو # خطأ! رسالة في مربع النص عند تنشيط النموذج.

إنشاء بيان للtblPODetail

USE [instkeeper_test]
GO


SET ANSI_NULLS ON
GO

SET QUOTED_IDENTIFIER ON
GO

CREATE TABLE [dbo].[tblPODetail](
    [intPurchaseOrderInstance] [int] IDENTITY(1,1) NOT NULL,
    [intPONumber] [int] NOT NULL,
    [datDateEntered] [datetime] NOT NULL,
    [bolPOOpen] [bit] NOT NULL,
    [intRMANumber] [nvarchar](255) NULL,
    [strSupplierCode] [nvarchar](50) NOT NULL,
    [strSupplierLastAddress] [nvarchar](50) NULL,
    [strSupplierLastCity] [nvarchar](50) NULL,
    [strSupplierLastState] [nvarchar](50) NULL,
    [strSupplierLastPostalCode] [nvarchar](50) NULL,
    [strSupplierLastCountry] [nvarchar](50) NULL,
    [strSupplierLastPhone] [nvarchar](50) NULL,
    [strSupplierLastFax] [nvarchar](50) NULL,
    [datDateSent] [datetime] NULL,
    [datDateReceived] [datetime] NULL,
    [bolAdvGageTrakNoTouch] [bit] NOT NULL,
    [bolAdvHardCopies] [bit] NOT NULL,
    [bolFreightShip] [bit] NOT NULL,
    [bolReturnableUsed] [bit] NOT NULL,
    [bolInHouse] [bit] NOT NULL,
    [strUPSTrackNumOut] [nvarchar](255) NULL,
    [strFedExTrackNumOut] [nvarchar](255) NULL,
    [strFreightTrackNumOut] [nvarchar](255) NULL,
    [strUPSTrackNumIn] [nvarchar](255) NULL,
    [strFedExTrackNumIn] [nvarchar](255) NULL,
    [strFreightTrackNumIn] [nvarchar](255) NULL,
    [SSMA_TimeStamp] [timestamp] NOT NULL
) ON [PRIMARY]

GO

ALTER TABLE [dbo].[tblPODetail]  WITH CHECK ADD  CONSTRAINT [SSMA_CC$tblPODetail$strSupplierCode$disallow_zero_length] CHECK  ((len([strSupplierCode])>(0)))
GO

ALTER TABLE [dbo].[tblPODetail] CHECK CONSTRAINT [SSMA_CC$tblPODetail$strSupplierCode$disallow_zero_length]
GO

ALTER TABLE [dbo].[tblPODetail] ADD  CONSTRAINT [DF__tblPODeta__intPO__6C190EBB]  DEFAULT ((0)) FOR [intPONumber]
GO

ALTER TABLE [dbo].[tblPODetail] ADD  CONSTRAINT [DF__tblPODeta__datDa__6D0D32F4]  DEFAULT (getdate()) FOR [datDateEntered]
GO

ALTER TABLE [dbo].[tblPODetail] ADD  CONSTRAINT [DF__tblPODeta__bolPO__6E01572D]  DEFAULT ((1)) FOR [bolPOOpen]
GO

ALTER TABLE [dbo].[tblPODetail] ADD  CONSTRAINT [DF__tblPODeta__bolAd__6EF57B66]  DEFAULT ((1)) FOR [bolAdvGageTrakNoTouch]
GO

ALTER TABLE [dbo].[tblPODetail] ADD  CONSTRAINT [DF__tblPODeta__bolAd__6FE99F9F]  DEFAULT ((1)) FOR [bolAdvHardCopies]
GO

ALTER TABLE [dbo].[tblPODetail] ADD  CONSTRAINT [DF__tblPODeta__bolFr__70DDC3D8]  DEFAULT ((0)) FOR [bolFreightShip]
GO

ALTER TABLE [dbo].[tblPODetail] ADD  CONSTRAINT [DF__tblPODeta__bolRe__71D1E811]  DEFAULT ((0)) FOR [bolReturnableUsed]
GO

ALTER TABLE [dbo].[tblPODetail] ADD  CONSTRAINT [DF__tblPODeta__bolIn__72C60C4A]  DEFAULT ((0)) FOR [bolInHouse]
GO

إنشاء بيان للtblPOGaugeDetail

USE [instkeeper_test]
GO


SET ANSI_NULLS ON
GO

SET QUOTED_IDENTIFIER ON
GO

CREATE TABLE [dbo].[tblPOGaugeDetail](
    [intItemPOID] [int] IDENTITY(1,1) NOT NULL,
    [intGagePOID] [int] NOT NULL,
    [strGageDetailID] [nvarchar](50) NULL,
    [datGageSent] [datetime] NULL,
    [datGageReceived] [datetime] NULL,
    [bolGageCalibrate] [bit] NOT NULL,
    [bolGageRepair] [bit] NOT NULL,
    [bolGageEvaluate] [bit] NOT NULL,
    [bolGageAccredited] [bit] NOT NULL,
    [bolGageReturned] [bit] NOT NULL,
    [bolGageException] [bit] NOT NULL,
    [bolGageExceptResolved] [bit] NOT NULL,
    [bolGageLeavePriceBlank] [bit] NOT NULL,
    [intGageCost] [real] NULL,
    [intTurnaroundDaysOut] [int] NULL,
    [SSMA_TimeStamp] [timestamp] NOT NULL,
 CONSTRAINT [tblPOGaugeDetail$PrimaryKey] PRIMARY KEY CLUSTERED 
(
    [intItemPOID] ASC
)WITH (PAD_INDEX  = OFF, STATISTICS_NORECOMPUTE  = OFF, IGNORE_DUP_KEY = OFF, ALLOW_ROW_LOCKS  = ON, ALLOW_PAGE_LOCKS  = ON) ON [PRIMARY]
) ON [PRIMARY]

GO

ALTER TABLE [dbo].[tblPOGaugeDetail]  WITH CHECK ADD  CONSTRAINT [tblPOGaugeDetail$tblPODetailtblPOGaugeDetail] FOREIGN KEY([intGagePOID])
REFERENCES [dbo].[tblPODetail] ([intPurchaseOrderInstance])
ON UPDATE CASCADE
GO

ALTER TABLE [dbo].[tblPOGaugeDetail] CHECK CONSTRAINT [tblPOGaugeDetail$tblPODetailtblPOGaugeDetail]
GO

ALTER TABLE [dbo].[tblPOGaugeDetail] ADD  DEFAULT ((0)) FOR [intGagePOID]
GO

ALTER TABLE [dbo].[tblPOGaugeDetail] ADD  DEFAULT ((1)) FOR [bolGageCalibrate]
GO

ALTER TABLE [dbo].[tblPOGaugeDetail] ADD  DEFAULT ((0)) FOR [bolGageRepair]
GO

ALTER TABLE [dbo].[tblPOGaugeDetail] ADD  DEFAULT ((0)) FOR [bolGageEvaluate]
GO

ALTER TABLE [dbo].[tblPOGaugeDetail] ADD  DEFAULT ((0)) FOR [bolGageAccredited]
GO

ALTER TABLE [dbo].[tblPOGaugeDetail] ADD  DEFAULT ((0)) FOR [bolGageReturned]
GO

ALTER TABLE [dbo].[tblPOGaugeDetail] ADD  DEFAULT ((0)) FOR [bolGageException]
GO

ALTER TABLE [dbo].[tblPOGaugeDetail] ADD  DEFAULT ((0)) FOR [bolGageExceptResolved]
GO

ALTER TABLE [dbo].[tblPOGaugeDetail] ADD  DEFAULT ((0)) FOR [bolGageLeavePriceBlank]
GO

ALTER TABLE [dbo].[tblPOGaugeDetail] ADD  DEFAULT ((0)) FOR [intGageCost]
GO

ALTER TABLE [dbo].[tblPOGaugeDetail] ADD  DEFAULT ((0)) FOR [intTurnaroundDaysOut]
GO

وبيان الاستعلام عن تفاصيل طلب الشراء الذي أريد أن تظهر التهم في

SELECT dbo_tblPODetail.intPurchaseOrderInstance, dbo_tblPODetail.strSupplierCode, dbo_tblPODetail.bolPOOpen, dbo_tblPODetail.intPONumber, dbo_tblPODetail.datDateSent
FROM dbo_tblPODetail
WHERE (((dbo_tblPODetail.bolPOOpen)=True))
ORDER BY dbo_tblPODetail.datDateSent;

ولقد كنت محبطا بعض الشيء لأنني قد قرأت قليلا على كل من DCOUNT () وCOUNT SELECT (*)، ولكن لا يمكن أن يبدو للحصول على -either- منهم للعمل. أي مساعدة سيكون موضع تقدير كبير! ويرجع الفضل في ذلك مسبقا!

و- محرر 2009/6/18 @ 1542 ساعات -

وهذا مثال من COUNT SELECT حاولت استخدام في التعليمات البرمجية عندما تسببت ال فرعي في الحدث الحالي:

SELECT COUNT(*) AS ItemsSent 
FROM [dbo_tblPOGaugeDetail] 
WHERE [dbo_tblPOGageDetail]![intGagePOID] = [dbo_tblPODetail]![intPurchaseOrderInstance]

وهذا مثال من البيان = DCOUNT كما تعلق على التحكم في النموذج الفرعي.

=DCOUNT("*", "[dbo_tblPOGaugeDetail]", "[intGagePOID] = [Forms]![frmSupplierInfoMain]![subfrmOpenPOBySupplierID]![intPurchaseOrderInstance]")

وأيا من هذه عملت - للأسف

Answer 1

هل تعمل الاستعلام الخاص بك دون العد (*)؟

استخدم اسم الحقل الفعلي للحجة الأولى من DCOUNT الحصول على اسم عنصر التحكم من السلسلة حيث.

For DCOUNT("[intItemPOID],"[dbo_tblPOGaugeDetail]","[intGagePOID]=" & Forms]![frmSupplierInfoMain]![subfrmOpenPOBySupplierID]![intPurchaseOrderInstance])