by: Agoston Bejo |
last post by:
I want to enforce such a constraint on a column that would ensure that the
values be all unique, but this wouldn't apply to NULL values. (I.e. there
may be more than one NULL value in the column.)...
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by: Alex82 |
last post by:
I can't use it....for example i have to create a column that accept values
between 1 to 120...i can't enumerate all of them....or i have to accept a
value different from NULL if an other column has...
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by: A.M. de Jong |
last post by:
Reading a lot about Nulls right now I still can't find a Technical reason to
use it or not.
For what I've understand is this:
In an Ingres database a Null column has a standard extra storage...
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by: iStrain |
last post by:
Hiya. I'm _sure_ this is an FAQ, but Googling hasn't produced the
answer in a way I can make sense out of. I know I should get this, but
so far no way...
I'm creating tables and doing queries in...
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by: sianan |
last post by:
I tried to use the following example, to add a checkbox column to a
DataGrid in an ASP.NET application:
http://www.codeproject.com/aspnet/datagridcheckbox.asp
For some reason, I simply CAN'T get...
|
by: Edmund Dengler |
last post by:
Greetings!
Just trying some tests out, and wanted to know about some optimizations.
If I do a CHECK constraint on a table, is this used to optimize a SELECT
or does Postgresql rely mostly on...
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by: Daniel Martini |
last post by:
Hi all,
I'm currently coding some functions in plpgsql for generating
reports out of records in a table. Problem is: NULL values in
records make the complete function fail.
Here is a simple...
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by: Susanne Klemm |
last post by:
Hi!
I have a table with a check constraint. But unfortunately it does not
work like I wanted.
CREATE TABLE MAP
(
NOT NULL,
NULL,
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by: ferg |
last post by:
I have a Customer table. The table has two different CHECK constraints.
Then there is the Customer details dialog, which provides the user with
an UI for changing users. I have some UPDATE sql,...
|
by: =?Utf-8?B?UGV0ZXJX?= |
last post by:
I have a TabControl on a Windows form in which I have various tab pages each
with a DataGridView, the first column of which is a
DataGridViewCheckBoxColumn and subsequent columns being...
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by: Charles Arthur |
last post by:
How do i turn on java script on a villaon, callus and itel keypad mobile phone
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by: nemocccc |
last post by:
hello, everyone, I want to develop a software for my android phone for daily needs, any suggestions?
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by: Sonnysonu |
last post by:
This is the data of csv file
1 2 3
1 2 3
1 2 3
1 2 3
2 3
2 3
3
the lengths should be different i have to store the data by column-wise with in the specific length.
suppose the i have to...
|
by: Hystou |
last post by:
There are some requirements for setting up RAID:
1. The motherboard and BIOS support RAID configuration.
2. The motherboard has 2 or more available SATA protocol SSD/HDD slots (including MSATA, M.2...
|
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...
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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,...
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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...
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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,...
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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...
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