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Thread: [RESOLVED] need to apply WHERE to SELECT clause that uses CONCAT.... I'm confused....

  1. #1
    Join Date
    Sep 2007
    Posts
    24

    resolved [RESOLVED] need to apply WHERE to SELECT clause that uses CONCAT.... I'm confused....

    I'm in over my head again and hoping someone can lend me a hand.

    I'm trying to use a select CONCAT query to create one of the values for my database driven Select Form field. the problem is that I need to limit it to only create options for items which appear in the "aircraft" array I've created earlier in the page. Because the field I want to limit by "model_code" is not in the CONCAT request it won't work (I get a "unknown column" type of error) I've been trying to figure something out but I just feel like that has to be a fairly straightforward way to do this.

    Here is where I pull the list I'd like to limit the results to and make it usable:

    Code:
    <?php
    $aircraft_id=$_GET['article_id'];
    
    connection good stuff here:
    
    
    $query=" SELECT * FROM articles WHERE id='$article_id'";
    $result=mysql_query($query);
    $num=mysql_numrows($result);
    
    
    
    $i=0;
    while ($i < $num) {
    
    $aircraft=explode(',', $aircraft_result);  
    $num_ac = count($aircraft);
    
    
    ++$i;
    }
    
    ?>
    Below is pretty much the whole code relating to the select boxes. The left box has a full list of aircraft and I'd like the right box to only have the aircraft that have previously been selected and are stored in my database as a comma delineated list.

    Code:
    <table border="0">
    
    <tr>
    
      <td>
    
     
    
        <select multiple size="20" style="width:70" name="listLeft"> 
    
    
    
          <?php
    
    $query1 = "SELECT *,CONCAT( make, ' ', model ) AS aircraft_label FROM aircraft_models";
    
    $result1 = mysql_query($query1) or die(mysql_error());
    
    
    
    $primary = array(); 
    
    
    while ($row = mysql_fetch_assoc($result1)) {
    $primary[$row['model_code']] = $row['aircraft_label'];
    }
    	
    $primary = str_replace(" ", " ", $primary);
    
    
    foreach ($primary as $key => $value)
    {
    echo '<OPTION value='.$key.'> '.$value.'';
    }
    echo '</option>';
    
    ?>
    
        </select>
    
      </td>
    
      <td><NOBR>   
    
        <input type="button" style="width:90" onclick="moveDualList( this.form.listLeft,  this.form.listRight, false );arrayWrite()"
    
        name="Add     >>"  value="Add       >>">     <BR>
    
        <NOBR>       
    
        <input type="button" style="width:90" onclick="moveDualList( this.form.listRight, this.form.listLeft,  false );arrayWrite()"  
    
        name="Add     <<"  value="Remove       <<">     <BR>
    
        <NOBR>       
    
        <input type="button" style="width:90" onclick="moveDualList( this.form.listLeft,  this.form.listRight, true  );arrayWrite();"  
    
        name="Add All >>"  value="Add All >>">     <BR>
    
        <NOBR>       
    
        <input type="button" style="width:90" onclick="moveDualList( this.form.listRight, this.form.listLeft,  true  );arrayWrite()"  
    
        name="Add All <<"  value="Remove All <<">     <BR>
    
        </NOBR>
    
      </td>
    
      <td>
    
        <select multiple size="20" style="width:70" name="listRight">
    <option value="test">test2</option>
    
          <?php
    
    $query4 = "SELECT *,CONCAT( make, ' ', model ) AS aircraft_label2 FROM aircraft_models";
    $result4 = mysql_query($query4) or die(mysql_error());
    
    $primary4 = array(); 
    
    while ($row = mysql_fetch_assoc($result4)) {
    $primary4[$row['model_code']] = $row['aircraft_label2'];
    }
    	
    $primary4 = str_replace(" ", " ", $primary4);
    
    foreach ($primary4 as $key => $value)
    {
    echo '<OPTION value='.$key.'> '.$value.'</option>';
    }
    
    mysql_close();
     
       ?>
        </select>
      </td>
    </tr>
    </table>
    Any suggestions or hints would be very welcome!

  2. #2
    Join Date
    Aug 2005
    Location
    The Garden State
    Posts
    5,634
    i'm not sure i follow. is there some kind of pseudo foreign key between the two tables that you're using to try to limit the results? since you're using * everywhere, it's hard to tell what the structure of the tables are.
    Acceptable Use | SQL Forum FAQ | celery is tasteless | twitter

    celery is tasteless - currently needing some UI time

  3. #3
    Join Date
    Sep 2007
    Posts
    24
    Sorry. I'm pretty sloppy when it comes to code. That's what happens when designers try to be coders.

    Anyway. I actually just got it working so I'm going to slap a resolved on this one. Thanks for taking the time to look at my mess though!

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