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by: Fraser Hanson |
last post by:
Hello,
I have a table which has a foreign key relationship with itself. I
want and expect my updates to cascade (deletes definitely cascade as
expected) but instead I just get error 1217: foriegn key error.
I have written example code to use in reproducing the problem:
# Create the table
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by: jaYPee |
last post by:
I have search a lot of thread in google newsgroup and read a lot of
articles but still i don't know how to update the dataset that has 3
tables.
my 3 tables looks like the 3 tables from northwind database that has
an employees, orders, and order details.
the following are the 3 tables in my sql database
students
schyrsem
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by: Richard |
last post by:
Hi,
I have 1 dataset with 2 tables (Table1 as parent, Table2 as Child), 1 row in
both the tables.
I am updating it with a transaction. First parent then child.
When child update fails, it raise an exception, and rollback the parent
update. But it also change the rowstate of the parent row from Added to
unchanged
When you try to save again parent row never get created in database. So
child update will fail again.
Please suggest what am I...
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by: PAUL |
last post by:
Hello,
I have 2 datasets I am trying to update. The parent table seems to
update fine but when I go update the chiled table I get an error message
that says I need a related record in the parent table. However I put some
code in to display the key field of each parent table record (parent
dataset) and the value I am trying to put into the child table is there.
ParentTable ChildTable
ID------------------------<...
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by: PAUL |
last post by:
Hello,
I have 2 tables with a relationship set up in the dataset with vb
..net. I add a new record to the parent table then edit an existing child
record to have the new parent ID. However when I do the update the changed
parentid in the child table fails to change. No error is given its just that
the change is not written to the Database.
When I step through the records for the child table the one I would expect
to be changed has a row...
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by: James Hallam |
last post by:
I have a parent record with a child record.
The parent record contains structures and the child records contains
visits to those structures.
Each table has a field named "Complete", what I want is the structure
'complete' to be changed to true when ANY of the visits have been
completed.
I have tried to implement SQL to do this, but it gives me the error
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by: Hexman |
last post by:
Hello All,
What I'm trying to do is update a child record using a parent-child relation. I want to find out if it is faster than than doing multiple selects.
Anyways, I've created a dataset (ds), have 2 datatables (dtRC and dtST). Created the parent-child relationship with multiple columns and added the
relation to the dataset.
Now what I want is to move through each of the dtRC (parent) records, get all related dtST (child) records...
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by: |
last post by:
Hi,
I'm steel trying to read and update my XML file with Visual Basic
Express but i am unable to find the right way to read my xml file and
update it if neccessary...
Here is my problem : evry day, i store the number of children in my
classroom in my XML file. For exemple, on monday, my app ask me
something like this : msgbox ("Are the 28 children here today ?",vbyesno)
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by: G .Net |
last post by:
Hi Everybody
I was wondering if anybody could help me with something that has been
bothering me for some time. Basically, it is a problem I encountered some
time ago with DataSets. I found a solution (which I will refer to later) but
I have a gut feeling that there must be an easier way to do it.
In order I can explain the problem, consider the following: Suppose I have a
DataSet which has two tables "Customers" and "Orders". I set up...
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by: marktang |
last post by:
ONU (Optical Network Unit) is one of the key components for providing high-speed Internet services. Its primary function is to act as an endpoint device located at the user's premises. However, people are often confused as to whether an ONU can Work As a Router. In this blog post, we’ll explore What is ONU, What Is Router, ONU & Router’s main usage, and What is the difference between ONU and Router. Let’s take a closer look !
Part I. Meaning of...
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by: Hystou |
last post by:
Most computers default to English, but sometimes we require a different language, especially when relocating. Forgot to request a specific language before your computer shipped? No problem! You can effortlessly switch the default language on Windows 10 without reinstalling. I'll walk you through it.
First, let's disable language synchronization. With a Microsoft account, language settings sync across devices. To prevent any complications,...
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by: Oralloy |
last post by:
Hello folks,
I am unable to find appropriate documentation on the type promotion of bit-fields when using the generalised comparison operator "<=>".
The problem is that using the GNU compilers, it seems that the internal comparison operator "<=>" tries to promote arguments from unsigned to signed.
This is as boiled down as I can make it.
Here is my compilation command:
g++-12 -std=c++20 -Wnarrowing bit_field.cpp
Here is the code in...
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by: jinu1996 |
last post by:
In today's digital age, having a compelling online presence is paramount for businesses aiming to thrive in a competitive landscape. At the heart of this digital strategy lies an intricately woven tapestry of website design and digital marketing. It's not merely about having a website; it's about crafting an immersive digital experience that captivates audiences and drives business growth.
The Art of Business Website Design
Your website is...
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by: conductexam |
last post by:
I have .net C# application in which I am extracting data from word file and save it in database particularly. To store word all data as it is I am converting the whole word file firstly in HTML and then checking html paragraph one by one.
At the time of converting from word file to html my equations which are in the word document file was convert into image.
Globals.ThisAddIn.Application.ActiveDocument.Select();...
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by: TSSRALBI |
last post by:
Hello
I'm a network technician in training and I need your help.
I am currently learning how to create and manage the different types of VPNs and I have a question about LAN-to-LAN VPNs.
The last exercise I practiced was to create a LAN-to-LAN VPN between two Pfsense firewalls, by using IPSEC protocols.
I succeeded, with both firewalls in the same network. But I'm wondering if it's possible to do the same thing, with 2 Pfsense firewalls...
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by: adsilva |
last post by:
A Windows Forms form does not have the event Unload, like VB6. What one acts like?
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by: 6302768590 |
last post by:
Hai team
i want code for transfer the data from one system to another through IP address by using C# our system has to for every 5mins then we have to update the data what the data is updated we have to send another system
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by: muto222 |
last post by:
How can i add a mobile payment intergratation into php mysql website.
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