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by: Marcus |
last post by:
Hello, quick question about MySQL storing NULL values...
Say I have a textbox called $_POST and a variable $var.
if(empty($_POST))
$var = NULL;
else
$var = $_POST;
Disregarding filtering/formatting the data, upon inserting $var into
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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.)
How can I achieve this?
I suppose I would get the most-hated "table/view is changing,
trigger/function may not see it" error if I tried to write a trigger that
checks the uniqueness of non-null values upon insert/update.
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by: Ben Reese |
last post by:
When you bind a text box to a field that contains null values the text box
displays an empty string. Great!
My Database field is an integer and I want an empty text box to represent a
NULL value. However the EndEdit event on the datarow returns the error The
input string was in an incorrect format
I have failed to find a way to either trap the empty string in the
rowchanging event and turn it into DBNULL or to programatically...
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by: Jonas Hansson |
last post by:
Hi,
I have a problem regarding NULL values in a database when I retrieve the
data with the MySqlDataAdapter fill a DataSet with the returned value.
Whenever the SQL statement returns data that has a column of which the
first row has the value NULL, that whole column will be NULL for all
retrieved rows. Do I have to set a specific value in the
DataSet/MySqlDataAdapter for it to work as expected or is it a bug or is
it somehow supposed to...
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by: Micela |
last post by:
Hi,
Please help me out in this task.
I have a filed in the database of datetime. and 3 dropdown lists in the page.
Im using Asp.net with VB coding. The three dropdown lists are
1.for date
2.for month
3.for year
the value selected is to be placed in the db and after that to be retrieved to the page with selected values.
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by: adelscott |
last post by:
Hi,
I'm using an autocomplete extender and I would like to retrieve the ID
that goes with the label.
IE:
Label, ID
"Mr John","CLIENT0001"
"Mr Doe","CLIENT0002"
etc..
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by: gp |
last post by:
I am and have been using PDO for about a year now...and have finally
gotten around to solving the "DB NULL value" issues I ran into early
on...
I am looking for suggestions and techniques to deal with inserting DB
NULL values into my MySQL 5.x DB Tables....I am running PHP 5.2.x on BSD
6.x with Apache 2.2.x....
As mentioned I am writing all my web apps using the PDO extension to
connect and operate on the database. I realized early...
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by: phpachu |
last post by:
Hi,
I hav created a group of textboxes using a loop and its names are unique and names are assigned using variable ( like <input type=text name=$name1>). Then How can i retrieve the values in that textboxes after a button click with in a loop. Really I cant move from here. Can anyone plz help me..
Part of the my code is given below
<html>
<table>
<?php
// i hav an array "assocArray" and its count is "countarray"
for($i = 1; $i <...
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by: chirag1989 |
last post by:
i have created an arry of text box
now i want to retrieve the values of each text box so as to insert them in data base can anyone help how can i retrieve the values of array of textbox and store it in other array
Code Of creating text box array
<%@LANGUAGE="VBSCRIPT" CODEPAGE="1252"%>
<form action="ext1.asp" method="post">
<%for i=0 to 4
response.write "<input type=text name=txt id="&i&" ><br>"
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by: sreemati |
last post by:
ssue:
------
I am working on a health care system and currently facing problem with NULL values being introduced as part of my SQL query.
What is the query trying to do?
The query is trying to retrieve ids from summary table for a practice where the patient are dead and find out if there are same patients in other systems like clinics or hospitals where this patient might still be showing as alive. This is basically a data cleansing query....
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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: Hystou |
last post by:
Overview:
Windows 11 and 10 have less user interface control over operating system update behaviour than previous versions of Windows. In Windows 11 and 10, there is no way to turn off the Windows Update option using the Control Panel or Settings app; it automatically checks for updates and installs any it finds, whether you like it or not. For most users, this new feature is actually very convenient. If you want to control the update process,...
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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: 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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