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MySQL Query Error

Posted on 2012-03-13
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Last Modified: 2012-03-13
So I'm having an issue with the query below... it was created by my app developer but she is on maternity leave and is unreachable at the moment. This mysql query is linked to two tables for an online shopping site along with several fields. It was originally written to randomly pull product ids and post 4 of them into an image slider (through jquery and css) i believe. What I am trying to accomplish is to alter the code in order to specify which products i want to include in the slide show. I have been trolling forums and trying different things but they all seem to lead to an error... if someone could perhaps give me an idea of what I would need to change to specify the products that are being chosen that would be great. Thanks! ...an example of the random pull is written below:

global $db;


//first product
    $sliderid1 = 1;
    $sql = "
SELECT   products_image, products_price, products_description, products_name, " . TABLE_PRODUCTS . ".products_id
FROM " . TABLE_PRODUCTS . ", " . TABLE_PRODUCTS_DESCRIPTION . "
WHERE " . TABLE_PRODUCTS . ".products_id = " . TABLE_PRODUCTS_DESCRIPTION . ".products_id
ORDER BY RAND()
LIMIT 0 , 30";

$sql = $db->bindVars($sql, ':sliderid1:', $sliderid1, 'integer');
$result1 = $db->Execute($sql);
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Question by:JBober14
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2 Comments
 
LVL 14

Accepted Solution

by:
Scott Madeira earned 2000 total points
ID: 37716498
Something like this may work for you.  It is based on you knowing the product IDs you want to include.  If you get errors you will want to post the error message.  Also, you will want to run the actual SQL commands in phpMyAdmin to make sure the query does what you want.  After you have a query that generates the right output you can convert it into PHP.

the key line in the SQL is this:  AND " . TABLE_PRODUCTS . ".products_id in ". $id ;

Which limits the results to the list of product IDs (contained in the $id variable.)


		// Example product IDs. add as many as you want
		$pidarr[0] = 14;
		$pidarr[1] = 29;

		// Use the IDs to build part of the WHERE clause
		$ids = "(";
		foreach ($pidarr as $value){
			$ids .= $value . ", ";
		}
		
		// Trim the final ", " from the string
		$id	= substr($ids, 0, strlen($ids)-2). ")";
	
    $sliderid1 = 1;
    $sql = "
SELECT   
	products_image, 
	products_price, 
	products_description, 
	products_name, " . 
	TABLE_PRODUCTS . ".products_id
FROM " 
	. TABLE_PRODUCTS . ", " 
	. TABLE_PRODUCTS_DESCRIPTION . "
WHERE " 
	. TABLE_PRODUCTS . ".products_id = " . TABLE_PRODUCTS_DESCRIPTION . ".products_id
	AND " . TABLE_PRODUCTS . ".products_id in ". $id ;

$sql = $db->bindVars($sql, ':sliderid1:', $sliderid1, 'integer');
$result1 = $db->Execute($sql);

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Author Closing Comment

by:JBober14
ID: 37716871
This worked flawlessly! I'm still trying to dissect what you did as I am a new-comer to php and mysql but nonetheless i'd like to thank you for the quick response and accuracy first time around!
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