Go Premium for a chance to win a PS4. Enter to Win

x
  • Status: Solved
  • Priority: Medium
  • Security: Public
  • Views: 254
  • Last Modified:

Update database without get actual contain

Hi E's, in one field of my mysql database, I have this format nn nn nn, in practice like this, 05 44 99, 2 numeric, space, 2 numeric, space, 2 numeric.
Every time I have a value that was more bigger then one of the values in database, I need to upgrade the database (ex. If I have the new value '55', I need to remove 05 and return for the first place the number '44', becomes 44 55 99).

I can do that in this way:
call database
explode string to get 3 arrays
verify if new value is more bigger then the low number in database, if yes replace and restructure all array
implode the array to string
update database

This is the best way to do this?
Have any simple way to do this?

Regards, JC
 
0
Pedro Chagas
Asked:
Pedro Chagas
  • 2
1 Solution
 
Roger BaklundCommented:
Try the code below. You must change the name of the posted value ("New_number"), the table name, the column name and insert a WHERE condition.
$res = mysql_query('select Col from TableName where ...');
if(!$res) die(mysql_error());
$value = mysql_result($res,0);
$numbers = explode(' ',$value);
$new_number = (int) $_POST['New_number'];  # fetch new number
if(strlen($new_number)<2)        # if less than two digits...
  $new_number = '0'.$new_number; # ...prefix with a 0 
$numbers[] = $new_number;
sort($numbers);
while(count($numbers) > 3)  # if more than 3 numbers
  array_shift($numbers);    # remove smallest number
$new_value = implode(' ',$numbers);
$res = mysql_query("update TableName set Col='$new_value' where ...");
if(!$res) die(mysql_error());

Open in new window

0
 
Pedro ChagasWebmasterAuthor Commented:
Hi @cxr, thanks for your feedback.
Something don't work in your solution, and I thing it's a simple thing.
In your solution the first numbers never change, it's allways 00, and just change the third numbers, like 00 20 60, if the new value is 90, becomes 00 20 90, when the correct is 20 60 90.

Note: before the first update, the string have this number and format in database 00 00 00 (maybe this information was important)

I put my code in snippet code for you check and maybe change something.
relevant changes:
$existek->tres_pontos; //the variable that contain the string
$valor //is the variable that contain the number to check, like 44 or other

What is wrong in the code?

Regards, JC
        $value = $existek->tres_pontos;
	$numbers = explode(' ',$value);
	$new_number = $valor;  # fetch new number
	if(strlen($new_number)<2)        # if less than two digits...
  	$new_number = '0'.$new_number; # ...prefix with a 0 
	$numbers[] = $new_number;
	sort($numbers);
	while(count($numbers) > 3)  # if more than 3 numbers
  	array_shift($numbers);    # remove smallest number
	$new_value = implode(' ',$numbers);
	echo "<br>NEW $new_value";

Open in new window

0
 
Roger BaklundCommented:
The error must be somewhere else, this seems to work:
        $value = "00 20 60";
        $numbers = explode(' ',$value);
        $new_number = 90;
        if(strlen($new_number)<2)        # if less than two digits...
        $new_number = '0'.$new_number; # ...prefix with a 0 
        $numbers[] = $new_number;
        sort($numbers);
        while(count($numbers) > 3)  # if more than 3 numbers
        array_shift($numbers);    # remove smallest number
        $new_value = implode(' ',$numbers);
        echo "<br>NEW $new_value";
 
# output: NEW 20 60 90

Open in new window

0

Featured Post

Technology Partners: We Want Your Opinion!

We value your feedback.

Take our survey and automatically be enter to win anyone of the following:
Yeti Cooler, Amazon eGift Card, and Movie eGift Card!

  • 2
Tackle projects and never again get stuck behind a technical roadblock.
Join Now