Update with current Content PHP+MySQL - php

Question

I need to add Data to the Data that is already in the table.What i need to know is how to Add but i dont want to get the Data,manipulate it(Add) and then update.
Like Data= Data+NewData

Answer 1

With UPDATE, use the CONCAT MySQL function described here.
Example:
UPDATE table SET row = concat(row,'data to add') WHERE …

Answer 2

You don't need to get the data in the row before updating, just update the column that you need to.
http://www.w3schools.com/php/php_mysql_update.asp

Answer 3

If I understand correctly you need a way to execute an sql statement that UPDATE or INSERT data in one statement.
You could use REPLACE INTO or ON DUPLICATE KEY in your statement:
REPLACE INTO FOO(ID,BAR) VALUES('1','BAR')
OR
INSERT INTO FOO (ID, BAR) VALUES(1,'BAR1'),(3,'BAR2') ON DUPLICATE KEY UPDATE BAR=VALUES(BAR)

Answer 4

Well, first you have to connect. Youre question is not clear so, here
'$'
<?php
$link = mysql_connect('localhost', 'mysql_user', 'mysql_password');
if (!$link) {
die('Could not connect: ' . mysql_error());
}
echo 'Connected successfully';
mysql_close($link);
?>
and if you mean the content you want is already on that page, you can do this
mysql_connect("$host", "$username", "$password")or die("cannot connect");
mysql_select_db("$db_name")or die("cannot select DB");
<?
$sql="select * FROM `clients` where id = '".$id."' ORDER BY `id` DESC LIMIT 50;";
$row=mysql_query($sql) or die(mysql_error());
?>
<?php
while ($row = mysql_fetch_assoc($row)) {
?>
<h3> ID:</h3> <? echo $row["id"]; ?>
<hr>
<hr>
<h3> Date and time: </h3> <? echo $row["dt"]; ?>
<hr>
<h3> Name: </h3> <? echo $row["name"]; ?>
<hr>
<h3> Contact: </h3> <? echo $row["contact"]; ?>
<hr>
<h3> Notes: </h3> <? echo $row["note"]; ?>
<hr>
<h3> Our Comment: </h3> <? echo $row["comment"]; ?>
<hr>
<h3>Contacted:</h3>
<?
$boolval = $row["called"];
if ($boolval == 1)
{echo "Customer has been called";}
else
{echo "Customer has not been called";}
?>
<?php
};
?>
Hoe this helps

Answer 5

It sounds like what you want is a database model to do something like this:
$Model = db_table::fetch_by_id($id);
$Model->Name = 'new name';
$Model->update();
I've used custom database models to do this before, but I don't know of anything native to PHP that supports that.
Under the hood it's essentially doing this:
SELECT * FROM Google.Users WHERE id = '23';
//Your php business logic here\\
UPDATE Google.Users SET name='new name' WHERE id='23';

Answer 6

Okay, so if you want to append something this is how you do it.
For Strings ie text;
<?php
$a = "Hello ";
$b = $a . "World!"; // now $b contains "Hello World!"
$a = "Hello ";
$a .= "World!"; // now $a contains "Hello World!"
?>
For numbers, say you have 2 as current value, and 4 is the new value
<?php
$current=2;
$new=4;
$current += $new; // now current is 6 as we added the 4 to it.
?>
To add it to your Data base, you simply insert it
INSERT INTO TABLE (ID) VALUES($current);
//OR if you're form posts and/or gets to your php page.
$sql="INSERT INTO Tabel (new number, current number)
VALUES
('$_POST[numbernew]','$_POST[numberold]')";