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Use a parameters with the command object so you don't hard code values in the SQL statement.
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Im not sure what you mean. Could u edit my example to show me what you mean?
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I am designing a form for a Purchase Order System.
All is in place, data tables created and linked etc.
What I need is one field in a record to be the product of the preceding two fields.
IE I have a field that gives Price and a field that the User inputs Quantity (These are the Field Names).
I want the next field (Total) to auto fill the result of Price * Quantity.
Racking Brains has produced no result, anyone got a clue for a poor delusional chap?------------------------------------
I will never again mention that I was the poster of the One Millionth Lounge Post, nor that it was complete drivel. Dalek Dave
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I think the value can be created on the fly in a query and don't need a specific field to store it.
In case you really want the field, I think you have to use some update query to put the number in the field. The query can be executed when the focus leaves the quantity box. This is just a quick thought.
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I do need the field, and thanks for the advice, I will try that.
It didn't occur to me to try that approach, I naturally (and wrongly it seems), assumed that there was some maths processing ability in Access.------------------------------------
I will never again mention that I was the poster of the One Millionth Lounge Post, nor that it was complete drivel. Dalek Dave
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If I understand you correctly, you just want to have a field on your form which represents the Price*Quantity. This data will not be saved to your database table.
You can achieve this by creating a textbox on your form and placing the formula in the control source.
1) From the toolbox, click on Textbox, and create a new textbox on your form.
2) Right click on the textbox, choose properties, click on the data tab.
3) In the control source field, you will enter a formula like:
"=[PO]![Price]*[PO]![Quantity]" (no quotes, but use the equal sign)
The [PO] represents the table name of where your data is stored, followed by a bang (!), then the field name.
Hope this helps. 
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Further to my answer to a different approach (above), This also has possibilities, as although it is an Access DB, it is being run via a VB form at the front end, so I can post the toatl back into a field.
Cheers to both of you for two different approaches.------------------------------------
I will never again mention that I was the poster of the One Millionth Lounge Post, nor that it was complete drivel. Dalek Dave
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The approach loyal ginger referred to would be to use something like:
SELECT Price, Quantity, Price * Quantity AS Total
FROM table
WHERE condition
This gives you a record set that has a total field, without saving one on the disk. For an entry form you would use something like David Mujica's suggestion for the UI. This does violate your stated requirement of saving the field to disk. You might want to explore getting that requirement changed. All database fanatics will tell you so. 
According to the rules of relational databases, the total field does not belong stored in the table. It would be a violation of "normal form" (3rd normal form if I am not mistaken). Practically, it adds no information not already present and is subject to the creation of data anomalies from updates. If someone else wrote a program that uses the same database and in one place changes quantity, but forgets to update total, well, you get the picture. Triggers could be a way to deal with this, but the Access (Jet) backend doesn't have them. If you use an Access front end to a different database backend, that backend might have this capability.Please do not read this signature.
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Good Day All
I have an Sp and UDF. the UDF cant take #tables. so i want to incoporate the functionality that is being provided by the udf and make it part of the code. the first part of my statement creates a solid table that is being used in the UDF
truncate table temp
INSERT INTO temp
SELECT MTN.ID,S.DESCR,ISNULL(MTN.CYCLETEMPLATE,C.CYCLES) AS CYCLETEMPLATE,MTN.ACTV AS [ACTV]
FROM TBL_STAFF S
INNER JOIN MTM_ACTV_STAFF MTN ON
S.ID = MTN.STAFF
LEFT OUTER JOIN MTM_ACTV_STAFF_CYCLE C
ON C.IDL = MTN.ID
END
ELSE
BEGIN
SELECT MTN.ID,S.DESCR,ISNULL(MTN.CYCLETEMPLATE,C.CYCLES) AS CYCLETEMPLATE,MTN.ACTV AS [ACTV]
into temp
FROM TBL_STAFF S
INNER JOIN MTM_ACTV_STAFF MTN ON
S.ID = MTN.STAFF
LEFT OUTER JOIN MTM_ACTV_STAFF_CYCLE C
ON C.IDL = MTN.ID
END
and later in my Sp i have this line of statement
SELECT DESCR, dbo.GetSortedString(Cast(NULL AS varchar(8000))) AS CycleIdList,ACTV
INTO #TempSummary
FROM temp (NOLOCK)
GROUP BY DESCR,ACTV
ORDER BY DESCR,ACTV
which has no problem and later i want to update the Filed in the #TempSummary table like this
UPDATE #TempSummary
SET CycleIdList = dbo.Concat(#TempSummary.Descr,#TempSummary.actv)
now the problem is here, the Concat is the UDF. defined like this
create FUNCTION [dbo].[Concat] (@Name varchar(50),@Actv int)
RETURNS varchar(max)
WITH EXECUTE AS CALLER
AS
BEGIN
Declare @s varchar(max)
SET @s = ''
SELECT @s = @s + IsNull(',' + Cast(Cycletemplate AS varchar), '')
FROM temp (NOLOCK)
WHERE temp.Descr = @Name And temp.Actv = @Actv
GROUP BY Cycletemplate
ORDER BY Cycletemplate
IF (@S IS NOT NULL) AND (@S <> '') SET @S = SubString(@s, 2, Len(@S)-1)
RETURN @S
END
now i want to incoporate the functionality of the UDF and get rid of it. The UDF use the Temp created in the First example code based on the two fields. and generate the string and update the table #TempSummary. How can i incoporate this functionlity without using UDF.
ThanksVuyiswa Maseko,
Spoted in Daniweb-- Sorry to rant. I hate websites. They are just wierd. They don't behave like normal code.
C#/VB.NET/ASP.NET/SQL7/2000/2005/2008
http://www.vuyiswamaseko.com
vuyiswa@its.co.za
http://www.itsabacus.co.za/itsabacus/
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I'm trying to use both OleDbClient and OracleClient to get Tables/Views Schema but some data is incorrect.
only OracleDataReader.GetSchemaTable(), retrieves some correct data
but still I have the following problems:
1- For views, BaseTableName is the view name not really the name of base table of the view
2- Also BaseColumnName is the column name in the view not in the base table
3- I cannot find IsAutoIncrement or IsReadOnly columns in the schema table
4- Some data are incorrect with views only, such as IsKey:
IsKey is false for Primary Key columns, although it's retrieved correctly if I'm getting schema of table directly not schema of the view
can anybody helps me??
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What do I need to download/install to be able to create mysql db's and to access the db's? I work in a windows Visual Studio C++ environment and want to be able to create and run both the db and client on the same development machine. Later for production the db and the client may or may not run on the same box.
Any help would be appreciated.
Thanks
Al Kurlansky
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Alan Kurlansky wrote: What do I need to download/install to be able to create mysql db's and to access the db's?
The Community Server, and optionally a connector. You can use the Workbench to execute queries against the database, a bit similar to SQL Management Studio.I are Troll 
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Hi all,
I want to write a query in such a way to find the list of records which are between two dates i.e., consider the two dates are StartDate and EndDate.
Thanks in advance.
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This is an extremely simple query that is well documented. Have you even attempted to look?
I know the language. I've read a book. - _Madmatt
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Look at the
BETWEEN keyword.
As Mark said, this is very basic T-SQL. What have you researched?I don't speak Idiot - please talk slowly and clearly
'This space for rent'
Driven to the arms of Heineken by the wife
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| Just one more think that i would like to add is the datatype/format of your datetime variables, you may need to convert. Thanks
Md. Marufuzzaman
I will not say I have failed 1000 times; I will say that I have discovered 1000 ways that can cause failure – Thomas Edison.
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Hi All,
I'm looking to be able to predefine a particular user input as String, Int, or Dec (maybe others), as the particular case may be.
The available datatypes are stored in a table, associated with the property (see below) that they apply to.
When the user submits the filled in textbox, that entry will be put in a table column, probably as a varchar, and converted as needed, to or from the appropriate datatypes as predefined.
For example, the textbox may be asking for the property of "Length," for which "Dec" is the predefined datatype. Or, the textbox may be asking for the property "Count," for which INT would be the datatype, or "Color," for which varchar would be the datatype. A single column will store all of the results, no matter which kind of datatype is actually involved.
The Question: Is there a standard way of doing this kind of thing? Can you throw some keywords or techniques at me? Is it simply a bad idea to do what I'm talking about doing?
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Member 4125480 wrote: Is it simply a bad idea to do what I'm talking about doing?
Yes.
You could store the values as string (VARCHAR) and convert as necessary, but this is frought with dangers and misuses. Another option may be use a UDT, user defined type. Or possible use an xml column and store value and data type information.
I know the language. I've read a book. - _Madmatt
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I looked up UDTs today, and one thing that has come up is that they aren't supported in Azure, which is somewhat part of the long term plan.
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Member 4125480 wrote: Can you throw some keywords or techniques at me? Is it simply a bad idea to do what I'm talking about doing?
I can throw some mud at you. It is a horrible idea.
Come to think of it, are you by any chance the Lotus Notes architect?
 Luc Pattyn [Forum Guidelines] [Why QA sucks] [My Articles]
I only read code that is properly formatted, adding PRE tags is the easiest way to obtain that. [The QA section does it automatically now, I hope we soon get it on regular forums as well]
modified on Monday, February 8, 2010 7:57 AM
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Member 4125480 wrote: The Question: Is there a standard way of doing this kind of thing? Can you throw some keywords or techniques at me? Is it simply a bad idea to do what I'm talking about doing?
In effect, you'd be storing everything in a list, without type-safety. Using a database would be kinda overkill where a textfile would suffice. A bit of a mean remark, but a database is best suited for relational data
Member 4125480 wrote: or "Color," for which varchar would be the datatype.
I'd expect a color to be a number. You'd best prepare for a lot of conversion-problems, mostly centered around datetime and decimals.I are Troll 
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Hi.
i am currently building a project that contains data on a SQL server (2008),
i need to move some data from the server to a portable media (like SDF file or access file), the structure in both are the equal.
at certain queries i will want to query both databases , the server and portable one (so only one who has the portable database on the USB can get true results).
can anyone tel me which format would be the easiest to deal with this? for example is there a format that i can use to attach to the database and create a UNION query that should query the server and the file at once?
is it "healthy" to use a MDF file as the portable database and attach and deattach every time i want to use the database and then create a UNION query to the servers database?
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Hello guys, i am using a module.
I want to run a query whenever user updates an article.
Reason is: During article update Fileid becomes FileID under ImageURL column,
and this causes broken image paths for my case.
I want to keep this Fileid thing same whenever an update occurs at database table.
Following trigger works for new entries:
CREATE TRIGGER FileID_replace ON Articles
AFTER INSERT
AS
BEGIN
update Articles set ImageUrl=REPLACE(ImageUrl,'FileID','Fileid') where ArticleID = (select max(ArticleID) as ArticleID from Articles)
END
However i need a one to keep Fileid whenever an update occurs.
Would you please help?
Thank you.
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So create an UPDATE trigger. What difficulties are you having?
I know the language. I've read a book. - _Madmatt
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