by: Ron |
last post by:
Mandatories: Ver 7.3.4, Redhat Linux 8.0, P4, 2GB RAM
I want to add a 'nullable' foreign key to a column in a table. I have
tables "company" and "project" which may be related by...
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by: Andy |
last post by:
Hi All!
General statement: FK should not be nullabe to avoid orphans in DB.
Real life:
Business rule says that not every record will have a parent. It is
implemented as a child record has FK...
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by: Clifford Heath |
last post by:
I have a case where a table has two candidate primary keys,
but either (but not both) may be NULL. I don't want to store
a copy of the concatenated ISNULL'ed fields as an additional
column, though...
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by: ford_desperado |
last post by:
Why isn't ALLOW REVERSE SCANS the default?
Why do we have to
- drop PK
- create an index
- recreate PK
What are the advantages of indexes that do not allow reverse scans?
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by: ESPNSTI |
last post by:
Hi,
Please don't shoot me if the answer is simple, I'm new to .Net and C# :)
..
I'm attempting to convert a nullable type to it's "non-nullable" type in a
generic way (without knowing what...
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by: Joe Bloggs |
last post by:
Hi,
Can someone please kindly show me how to determine if a type (read value
type) is Nullable.
MSDN has this KB:
How to: Identify a Nullable Type (C# Programming Guide)...
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by: GG |
last post by:
I am trying to add a nullable datetime column to a datatable fails. I am
getting exception
DataSet does not support System.Nullable<>.
None of these works
dtSearchFromData.Columns.Add( new...
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by: Sam Kong |
last post by:
Hello,
I want to define a generic class which should accept only nullable
types or reference types.
What's the best way to costrain it?
---------
class MyClass<T>{
...
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by: scparker |
last post by:
I have yet to find a satisfactory solution to this problem. It involves
VB.NET 2.0 and datetime issues.
I have a form that asks for a Date to be submitted in dd/mm/yyyy
format. When this is...
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by: DolphinDB |
last post by:
Tired of spending countless mintues downsampling your data? Look no further!
In this article, you’ll learn how to efficiently downsample 6.48 billion high-frequency records to 61 million...
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by: ryjfgjl |
last post by:
ExcelToDatabase: batch import excel into database automatically...
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by: isladogs |
last post by:
The next Access Europe meeting will be on Wednesday 6 Mar 2024 starting at 18:00 UK time (6PM UTC) and finishing at about 19:15 (7.15PM).
In this month's session, we are pleased to welcome back...
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by: Vimpel783 |
last post by:
Hello!
Guys, I found this code on the Internet, but I need to modify it a little. It works well, the problem is this: Data is sent from only one cell, in this case B5, but it is necessary that data...
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by: jfyes |
last post by:
As a hardware engineer, after seeing that CEIWEI recently released a new tool for Modbus RTU Over TCP/UDP filtering and monitoring, I actively went to its official website to take a look. It turned...
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by: ArrayDB |
last post by:
The error message I've encountered is; ERROR:root:Error generating model response: exception: access violation writing 0x0000000000005140, which seems to be indicative of an access violation...
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by: PapaRatzi |
last post by:
Hello,
I am teaching myself MS Access forms design and Visual Basic. I've created a table to capture a list of Top 30 singles and forms to capture new entries. The final step is a form (unbound)...
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by: af34tf |
last post by:
Hi Guys, I have a domain whose name is BytesLimited.com, and I want to sell it. Does anyone know about platforms that allow me to list my domain in auction for free. Thank you
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by: isladogs |
last post by:
The next Access Europe User Group meeting will be on Wednesday 3 Apr 2024 starting at 18:00 UK time (6PM UTC+1) and finishing by 19:30 (7.30PM).
In this session, we are pleased to welcome former...
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