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by: Ken1 |
last post by:
I am going to drop a primary key from one column and create a new
column to be used as primary key in an existing database.
The old column was a date column which someone earlier though was a
good candidate for a primary key which we all know it's not.
Now I want to add a new field, i.e. called ID, with a normal number
sequence as primary key.
I have dropped the primary key, created the new column, created the
new sequence and created...
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by: Lannsjo |
last post by:
I need to change my primary key column type from smallint to int.
I have tried:
ALTER TABLE livegroup MODIFY id INT UNSIGNED NOT NULL AUTO_INCREMENT;
But get an error message certainly since my id-column is primary key
and references other tables as well.
How can I come around this problem?
Need help
/Martin
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by: blanch |
last post by:
Hi all,
I'm pretty new to MySQL, but have some Access background. I've created
a table for which I intended the email column to be the primary key,
but didn't specify it at creation. Now, I'm trying to figure out how
to specify it post facto.
Thanks,
blanch
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by: Waqas |
last post by:
Please see the detail of tables with fields in SQL server 2000.
·Table Student .Table Good Qualities
( It is a list of Students) (It is a list of Good Qualities)
1- Student Id (P.Key) 1- Serial No. (P. Key)
2- Student Name 2- Good Quality
· Table Bad Qualities .Table Future Plans
(It is a list of Bad Qualities) (It is a list of Plans)
1- Serial No. (P. Key) 1- Serial No....
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by: Peter Scott |
last post by:
I created a table that has a column in that needs to contain a full
Unix file path. Since 2048 was too long for a VARCHAR, I made it
TEXT. I since populated the table. Now I want to make the path
column a primary key, and I can't figure out how. (I googled the
web and groups without luck, looked over the reference manual also,
especially reading the entry on BLOBs.)
I was able to make a fulltext index with:
create fulltext index...
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by: Sami |
last post by:
Please bear with me, and if you answer this question, please do it
step by step. I am new at Access, not at all sophisticated. I am
using Office XP. This will need to be read in Access for Office 2000.
I am creating a database to track student athletes. I have created
the following tables. The table title is to the far left, with fields
under each. The common field will be the StudentID field, which is
their student number assigned...
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by: Joe |
last post by:
Hi All,
I am new to using the Access DB and I need some help if someone
is able to give it to me. What I want to do is get the names of
the columns of certain tables. Not the data in the table but the
table column names.
I've seen other posts that suggest using the SQL command DESCRIBE
but I can't get it to work for some reason. Other posts have code
samples but they're written in VB which I am not familiar with. I
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by: mal_k100 |
last post by:
Hi All,
1. Created table in SQL Server 2K with Primary key as int Identity
2. Link to table in MS Access 2K
3. Using form in MSAccess to update the linked table
I want SQL server to automatically update the int identity column as it
would normally. i.e. no need to enter a value even though it is a NOT
NULL field. SQL Server recognises this , allows the row details to be
entered without the int identity and creates it when moving to the...
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by: Mike S |
last post by:
Hi all,
A (possibly dumb) question, but I've had no luck finding a definitive
answer to it. Suppose I have two tables, Employees and Employers, which
both have a column named "Id":
Employees
-Id
-FirstName
-LastName
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by: =?Utf-8?B?QmFidU1hbg==?= |
last post by:
Hi,
I have a GridView and a SqlDataSource controls on a page. The SqlDataSource
object uses stored procedures to do the CRUD operations. The DataSource has
three columns one of which - "Modified" of type DateTime - is hidden since it
should not be edited by a user. The system handles the update for this
column. So, I have hidden (Visible=false) this column on the grid. In order
to access the value in this field, I have created a...
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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: 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: 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: 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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