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by: Marek Kotowski |
last post by:
I mean: which RDBMS
1) allows to declare that relationship is in fact 1-1, and
2) protests when one tries to violate the 1-1 relationship,
that is inserts into a table two records with the same
foreign key?
Thank you in advance.
Marek Kotowski
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by: pj |
last post by:
I tried to create a relationship in EM's diagram pane in
SQL Server 2000 (I'd list the version of EM, but About gives me
the MMC version, which is probably not relevant.)
(The database itself is SQL Server 2000 SP3.)
I got an error that I don't understand (because, at least
at first blush, it appears to be quite untrue). Note that
I have never clicked before on the diagrams child of the
database; this was entirely experimental.
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by: toedipper |
last post by:
Hello,
I am designing a table of vehicle types, nothing special, just a list of
unique vehicle types such as truck, lorry, bike, motor bike, plane, tractor
etc etc
For the table design I am proposing a single column table with a field name
called vehicle_type and this will contain the vehicle type.
Sot it will be
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by: Arpan |
last post by:
Suppose an ASP application which retrieves data from a SQL Server
database table is accessed by 100 users. Each of the users have a
password. Assume that the DB table has 25 columns
& the passwords of 3 users are 'A1', 'B2', 'C3' (excluding the quotes).
What the application should do is if the password is 'A1', then that
user should be displayed the records of the columns Column1, Column7,
Column16, Column20 & Column25 only. If the...
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by: Emily Jones |
last post by:
That subject line will have Joe Celko apoplectic!!
Let's say I have this thing. Oh, I don't know, a car. No, a vehicle. Can we
agree that is an entity type?
Some attributes might be VIN, Fuel, Color.
Some entity instances might be:
wvv2939-32-2993-2-90, Gasoline, Blue
wvv3942-3249--2830-2, Diesel, Red
I wanna make it easy to get the colors in. Keep a list of 'em somewhere. So
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by: Lea |
last post by:
I am working on a school project based on VB.NET and
Active Directory. In my project documentation, because I
used Active Directory as my basis for data, I must show an
entity relationship diagram or at least a data dictionary
showing field relationships between AD tables.
Does Microsoft have a database dictionary or something
that shows relationships of the various tables for Active
Directory?
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by: =?Utf-8?B?RU1hbm5pbmc=?= |
last post by:
(I originally posted this to the data access newsgroup but received no replies)
I've got an Access 2003 mdb that I'm converting to VB.Net. I'm having
trouble with getting the main data source to update after updates to a lookup
table.
There are 2 tables with a one-to-many relationship in the mdb. VB.Net
recognizes this relationship according to it's dataset designer diagram.
Currently I have 2 forms: a main form for data-entry and a...
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by: Cirene |
last post by:
Can you assist me with this database problem?
I have 4 tables in my db....
Table1 (key: Table1Id)
Table2 (key: Table2Id)
Table3 (key: Table3Id)
Table 4 has these fields:
key: Table4Id
Table1Id (ties it to Table 1)
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by: saurabh9gupta |
last post by:
I want ot generate a Network Diagram based on the information Stored in my Database
IP ADRESS STATUS
128.98.76.6 Active
128.96.35.21 Active
128.5.68.9 Not Active
I want to generate a network diagram in which the Active nodes are shown by a green link and non active in Red link.
How should i do this in C#
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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: tracyyun |
last post by:
Dear forum friends,
With the development of smart home technology, a variety of wireless communication protocols have appeared on the market, such as Zigbee, Z-Wave, Wi-Fi, Bluetooth, etc. Each protocol has its own unique characteristics and advantages, but as a user who is planning to build a smart home system, I am a bit confused by the choice of these technologies. I'm particularly interested in Zigbee because I've heard it does some...
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by: agi2029 |
last post by:
Let's talk about the concept of autonomous AI software engineers and no-code agents. These AIs are designed to manage the entire lifecycle of a software development project—planning, coding, testing, and deployment—without human intervention. Imagine an AI that can take a project description, break it down, write the code, debug it, and then launch it, all on its own....
Now, this would greatly impact the work of software developers. The idea...
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by: isladogs |
last post by:
The next Access Europe User Group meeting will be on Wednesday 1 May 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 a new presenter, Adolph Dupré who will be discussing some powerful techniques for using class modules.
He will explain when you may want to use classes instead of User Defined Types (UDT). For example, to manage the data in unbound forms.
Adolph will...
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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: 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: muto222 |
last post by:
How can i add a mobile payment intergratation into php mysql website.
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by: bsmnconsultancy |
last post by:
In today's digital era, a well-designed website is crucial for businesses looking to succeed. Whether you're a small business owner or a large corporation in Toronto, having a strong online presence can significantly impact your brand's success. BSMN Consultancy, a leader in Website Development in Toronto offers valuable insights into creating effective websites that not only look great but also perform exceptionally well. In this comprehensive...
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