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I need help!!


seany123

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I have asked this question about 3 times now and none of the times was i able to find the help i needed to complete this task... so now im going to try and explain it to the maximum and hope someone is able to help me.

 

 

Firstly i have 3 Tables in my database; "player", "blueprint_items", "items".

 

in players all im going to be using is $player->id.

 

but here is the table structure from the other two...

 

--

-- Table structure for table `blueprint_items`

--

 

CREATE TABLE IF NOT EXISTS `blueprint_items` (

  `id` int(11) NOT NULL auto_increment,

  `item_id` int(11) NOT NULL,

  `name` varchar(255) collate latin1_general_ci NOT NULL default '',

  `description` text collate latin1_general_ci NOT NULL,

  `type` enum('weapon','armour','shoe','Consumable','pet','rare','parts','other') collate latin1_general_ci NOT NULL default 'weapon',

  `Value` int(11) NOT NULL default '0',

  `shopcost` int(11) NOT NULL default '0',

  `strengthbonus` int(11) NOT NULL default '0',

  `defensebonus` int(11) NOT NULL default '0',

  `speedbonus` int(11) NOT NULL default '0',

  `powerbonus` int(11) NOT NULL default '0',

  `torquebonus` int(11) NOT NULL default '0',

  `weightbonus` int(11) NOT NULL default '0',

  `img` varchar(255) collate latin1_general_ci NOT NULL,

  `features` varchar(255) collate latin1_general_ci NOT NULL,

  PRIMARY KEY  (`id`)

) ENGINE=MyISAM  DEFAULT CHARSET=latin1 COLLATE=latin1_general_ci AUTO_INCREMENT=96 ;

 

--

-- Table structure for table `items`

--

 

CREATE TABLE IF NOT EXISTS `items` (

  `id` int(11) NOT NULL auto_increment,

  `player_id` int(11) NOT NULL default '0',

  `item_id` int(11) NOT NULL default '0',

  `status` enum('equipped','unequipped') collate latin1_general_ci NOT NULL default 'unequipped',

  PRIMARY KEY  (`id`)

) ENGINE=MyISAM  DEFAULT CHARSET=latin1 COLLATE=latin1_general_ci AUTO_INCREMENT=146 ;

 

 

Now what im wanted to do is to identify all the rows in "items" which apply to my player.. so i did this query:

 

<?php
$query = $db->execute("select * from items where `player_id`=?", array($player->id));
$item = $query->fetchrow();
?>

 

then i wanted to get all the info from blueprint_items:

 

<?php
$query2 = $db->execute("select * from `blueprint_items` where `id`=?",array($item['item_id']));
$item2 = $query2->fetchrow();
?>

 

but then here is where i hit a snag... what i want to do is only show 1 record from "items" table when the recordcount is bigger than 1..

 

so i did this..

 

<?php
$query3 = $db->execute("select * from `blueprint_items` where `id`=?",array($item['item_id']));
while($query3->recordcount() <= 1){
?>

 

Then i realised i needed to get the information from "items" again so i did this...

 

<?php
$query4 = $db->execute("select * from `items` where `player_id`=? and `item_id`=? LIMIT=1", array($player->id, $item['item_id']));
?>

 

But this didnt work... its stilling echoing from all the rows.

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<?php
$query2 = $db->execute("select * from `blueprint_items` where `id`=?",array($item['item_id']));
$item2 = $query2->fetchrow();
?>

 

but then here is where i hit a snag... what i want to do is only show 1 record from "items" table when the recordcount is bigger than 1..

Just use Limit

select * from `blueprint_items` where `id`=? LIMIT 0,1

 

 

Then i realised i needed to get the information from "items" again so i did this...

 

<?php
$query4 = $db->execute("select * from `items` where `player_id`=? and `item_id`=? LIMIT=1", array($player->id, $item['item_id']));
?>

 

But this didnt work... its stilling echoing from all the rows.

Again

LIMIT 0,1

 

Moving to correct section (being an SQL problem)

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*sarcasm* Yeah! More PHP joins!

 

I hate when I see this done in PHP. This is what your relational database was designed for. Otherwise you might as well be storing your data in text files. I don't know exactly what you're trying to do but a sample query may look like this.

 

SELECT *
FROM player p
JOIN (
  -- This limits to one item per player.
  -- You may want to use min or some CASE statement to get
  -- the correct item.
  SELECT player_id, MAX(id) AS id, COUNT(id) AS num_items
  FROM items
  WHERE player_id = 1
) items_sub ON p.id = items_sub.player_id 
JOIN items i ON items_sub.id = i.id
JOIN blueprint_items bi ON i.id = bi.item_id
WHERE p.id = 1

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<?php
$query2 = $db->execute("select * from `blueprint_items` where `id`=?",array($item['item_id']));
$item2 = $query2->fetchrow();
?>

 

but then here is where i hit a snag... what i want to do is only show 1 record from "items" table when the recordcount is bigger than 1..

Just use Limit

select * from `blueprint_items` where `id`=? LIMIT 0,1

 

 

Then i realised i needed to get the information from "items" again so i did this...

 

<?php
$query4 = $db->execute("select * from `items` where `player_id`=? and `item_id`=? LIMIT=1", array($player->id, $item['item_id']));
?>

 

But this didnt work... its stilling echoing from all the rows.

Again

LIMIT 0,1

 

Moving to correct section (being an SQL problem)

 

 

that made nothing change.

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well this is the code... and i cant see anything wrong...

 

<?php
include("lib.php");
define("PAGENAME", "Mafia");
$player = check_user($secret_key, $db);
include("templates/private_header3.php");
?>

<div id="left_c">

<div class="g_content"><h3>  Equipment</h3><div class="g_text">
<table align='center' cellspacing='10'>
<?php

$current_col = 1;
$max_col = 4;

$query = $db->execute("select * from items where `player_id`=?", array($player->id));
$item = $query->fetchrow();

$query2 = $db->execute("select * from `blueprint_items` where `id`=? LIMIT 0,1",array($item['item_id']));
$item2 = $query2->fetchrow();

$query3 = $db->execute("select * from `blueprint_items` where `id`=?",array($item['item_id']));
while($query3->recordcount() <= 1){

$query4 = $db->execute("select * from `items` where `player_id`=? and `item_id`=? LIMIT 0,1", array($player->id, $item['item_id']));
$item3 = $query4->fetchrow();

if ($query3->recordcount() <= 1) {
    //Open new row if first column
    if($current_col==1)
    {
        echo "<tr>\n";
    }	

    //Display current record

    echo "<td>";
echo "<center><img src=\"{$item2['img']}\" width='80' height='80' style=\"border: 1px solid #CC9900\"></center>";
    echo "<center><a href=\"../description.php?id={$item2['id']}\">{$item2['name']}</a></center>";
echo "<center>[<a href='../item.php?sell=".$item3['id']."'>Sell</a>] [<a href='../item.php?market=".$item3['id']."'>Market</a>] <br>[<a href='../item.php?send=".$item3['id']."'>Send</a>] [<a href='../item.php?use=".$item3['id']."'>Use</a>]</center><br>";
    echo "</td>\n";
 //Close row if last column
    if($current_col==$max_col)
    {
        echo "<tr>\n";
        $current_col = 0;  //<---Changed
    }
    $current_col++;
}

else if ($query3->recordcount() >= 2) {


    //Display current record

    echo "<td>";
echo "<center><img src=\"{$item2['img']}\" width='80' height='80' style=\"border: 1px solid #CC9900\"></center>";
    echo "<center><a href=\"../description.php?id={$item2['id']}\">{$item2['name']}</a></center>";
echo "<center>[<a href='../item.php?sell=".$item3['id']."'>Sell</a>] [<a href='../item.php?market=".$item3['id']."'>Market</a>] <br>[<a href='../item.php?send=".$item3['id']."'>Send</a>] [<a href='../item.php?use=".$item3['id']."'>Use</a>]</center><br>";
    echo "<center>Quantity IS EQUAL TOO!!</center>";
echo $query3->recordcount();
echo "</td>\n";
 //Close row if last column
    if($current_col==$max_col)
    {
        echo "<tr>\n";
        $current_col = 0;  //<---Changed
    }
    $current_col++;
}

//Close last row if needed
if ($current_col!=1)
{
    for(; $current_col<=$max_col; $current_col++)
    {
        echo "<td> </td>\n";
    }
}
}

?>
</table>
</div></div>

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Hi

 

This seems to be a duplicate of :-

 

http://www.phpfreaks.com/forums/index.php/topic,267967.0.html

 

Why are you doing 4 seperate pieces of SQL and then trying to struggle with the results when one single query would appear to do it (example from artacus seems to cover it)?

 

What object are you using to access the database and so what is recordcount? Is it just a count of the number of the current row? You appear to do 2 selects against blueprint_items, but don't actually do anything with the 2nd (not even bring back a row) except check that its recordcount is <= 1.

 

All the best

 

Keith

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iHi

 

His SQL just brings back one row for each.

 

SELECT *
FROM player p
JOIN (
  -- This limits to one item per player.
  -- You may want to use min or some CASE statement to get
  -- the correct item.
  SELECT player_id, MAX(id) AS id, COUNT(id) AS num_items
  FROM items
  WHERE player_id = 1
) items_sub ON p.id = items_sub.player_id 
JOIN items i ON items_sub.id = i.id
JOIN blueprint_items bi ON i.id = bi.item_id
WHERE p.id = 1

 

I will try and go through it to break it down for you:-

 

SELECT *

FROM player p

 

Self explanitory

 

JOIN (

  SELECT player_id, MAX(id) AS id, COUNT(id) AS num_items

  FROM items

  WHERE player_id = 1

) items_sub

ON p.id = items_sub.player_id

 

Find the max id and count of ids for the particular player from the items table. This will bring back a single row. So joining this to players gives you the max id and count of ids for that particular player.

 

JOIN items i ON items_sub.id = i.id

 

This gets the rest of the fields from the items table. It gets the ones that have the id that matches the max id found for that player.

 

JOIN blueprint_items bi ON i.id = bi.item_id

 

Get the details for that single item from the blueprint_items table.

 

WHERE p.id = 1

 

Limit it to the player with the id of 1. Probably not strictly necessary as you have limited it in the section in green

 

This will give you a single row.

 

If you want one row per type of item for a player then the SQL I put in the other thread will do the job:-

 

SELECT a.name, a.someOtherField, b.ItemCount
(SELECT item_id, count(id) AS ItemCount FROM items WHERE player_id = 1 GROUP BY item_id)a
INNER JOIN blueprint_items b
ON a.item_id = b.item_id

 

This kind of thing is what SQL is designed for. You join related data from tables in SQL. Doing queries on the results of queries is pretty inefficient.

 

All the best

 

Keith

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  • 2 weeks later...

im still having problems integrating that with my current code....

 

 


<?php
include("lib.php");
define("PAGENAME", "MafiaKillerz");
$player = check_user($secret_key, $db);
include("templates/private_header3.php");
?>

<div id="left_c">

<div class="g_content"><h3>  Equipment</h3><div class="g_text">
<table align='center' cellspacing='10'>
<?php

$current_col = 1;
$max_col = 4;

// GET ALL FROM ITEMS
// TO GET ALL ROWS USING PLAYER->ID.
$query = $db->execute("select * from items where `player_id`=?", array($player->id));
$item = $query->fetchrow();

//GET ALL FROM BLUEPRINTS.
//TO GET ALL ROWS USING PLAYER-ID & ITEM['id']
$query2 = $db->execute("select * from `blueprint_items` where `id`=? LIMIT 0,1",array($item['id']));
$item2 = $query2->fetchrow();

$query3 = $db->execute("select * from `blueprint_items` where `id`=?",array($item['id']));
while($query3->recordcount() <= 1){

$query4 = $db->execute("select * from `items` where `player_id`=? and `item_id`=? LIMIT 0,1", array($player->id, $item['id']));
$item3 = $query4->fetchrow();

if ($query3->recordcount() <= 1) {
    //Open new row if first column
    if($current_col==1)
    {
        echo "<tr>\n";
    }	

    //Display current record

    echo "<td>";
echo "<center><img src=\"{$item2['img']}\" width='80' height='80' style=\"border: 1px solid #CC9900\"></center>";
    echo "<center><a href=\"../description.php?id={$item2['id']}\">{$item2['name']}</a></center>";
echo "<center>[<a href='../item.php?sell=".$item3['id']."'>Sell</a>] [<a href='../item.php?market=".$item3['id']."'>Market</a>] <br>[<a href='../item.php?send=".$item3['id']."'>Send</a>] [<a href='../item.php?use=".$item3['id']."'>Use</a>]</center><br>";
    echo "</td>\n";
 //Close row if last column
    if($current_col==$max_col)
    {
        echo "<tr>\n";
        $current_col = 0;  //<---Changed
    }
    $current_col++;
}

else if ($query3->recordcount() >= 2) {


    //Display current record

    echo "<td>";
echo "<center><img src=\"{$item2['img']}\" width='80' height='80' style=\"border: 1px solid #CC9900\"></center>";
    echo "<center><a href=\"../description.php?id={$item2['id']}\">{$item2['name']}</a></center>";
echo "<center>[<a href='../item.php?sell=".$item3['id']."'>Sell</a>] [<a href='../item.php?market=".$item3['id']."'>Market</a>] <br>[<a href='../item.php?send=".$item3['id']."'>Send</a>] [<a href='../item.php?use=".$item3['id']."'>Use</a>]</center><br>";
    echo "<center>Quantity IS EQUAL TOO!!</center>";
echo $query3->recordcount();
echo "</td>\n";
 //Close row if last column
    if($current_col==$max_col)
    {
        echo "<tr>\n";
        $current_col = 0;  //<---Changed
    }
    $current_col++;
}

//Close last row if needed
if ($current_col!=1)
{
    for(; $current_col<=$max_col; $current_col++)
    {
        echo "<td> </td>\n";
    }
}
}

?>
</table>
</div></div>

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Hi

 

It is difficult to work out what you really want, as the php doesn't really go with what you have said you want.

 

This is my best guess as what you want:-

 

<?php
include("lib.php");
define("PAGENAME", "MafiaKillerz");
$player = check_user($secret_key, $db);
include("templates/private_header3.php");
?>

<div id="left_c">

<div class="g_content"><h3>  Equipment</h3><div class="g_text">
<table align='center' cellspacing='10'>
<?php
$query = $db->execute("SELECT bi.img AS blueprintimg, bi.id AS blueprintid, bi.name AS blueprintname, i.id as itemid FROM player p JOIN (SELECT player_id, MAX(id) AS id, COUNT(id) AS num_items FROM items WHERE player_id = 1) items_sub ON p.id = items_sub.player_id JOIN items i ON items_sub.id = i.id JOIN blueprint_items bi ON i.id = bi.item_id WHERE p.id = ?", array($player->id));
$item = $query->fetchrow();

while($item = $query->fetchrow())
{
echo "<tr>\n";
echo "<td>";
echo "<center><img src=\"{$item['blueprintimg']}\" width='80' height='80' style=\"border: 1px solid #CC9900\"></center>";
echo "<center><a href=\"../description.php?id={$item['blueprintid']}\">{$item['blueprintname']}</a></center>";
echo "<center>[<a href='../item.php?sell=".$item['itemid']."'>Sell</a>] [<a href='../item.php?market=".$item['itemid']."'>Market</a>] <br>[<a href='../item.php?send=".$item['itemid']."'>Send</a>] [<a href='../item.php?use=".$item['itemid']."'>Use</a>]</center><br>";
echo "</td>\n";
echo "<tr>\n";
}

?>
</table>
</div></div>

 

All the best

 

Keith

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Hi

 

It is difficult to work out what you really want, as the php doesn't really go with what you have said you want.

 

This is my best guess as what you want:-

 

<?php
include("lib.php");
define("PAGENAME", "MafiaKillerz");
$player = check_user($secret_key, $db);
include("templates/private_header3.php");
?>

<div id="left_c">

<div class="g_content"><h3>  Equipment</h3><div class="g_text">
<table align='center' cellspacing='10'>
<?php
$query = $db->execute("SELECT bi.img AS blueprintimg, bi.id AS blueprintid, bi.name AS blueprintname, i.id as itemid FROM player p JOIN (SELECT player_id, MAX(id) AS id, COUNT(id) AS num_items FROM items WHERE player_id = 1) items_sub ON p.id = items_sub.player_id JOIN items i ON items_sub.id = i.id JOIN blueprint_items bi ON i.id = bi.item_id WHERE p.id = ?", array($player->id));
$item = $query->fetchrow();

while($item = $query->fetchrow())
{
echo "<tr>\n";
echo "<td>";
echo "<center><img src=\"{$item['blueprintimg']}\" width='80' height='80' style=\"border: 1px solid #CC9900\"></center>";
echo "<center><a href=\"../description.php?id={$item['blueprintid']}\">{$item['blueprintname']}</a></center>";
echo "<center>[<a href='../item.php?sell=".$item['itemid']."'>Sell</a>] [<a href='../item.php?market=".$item['itemid']."'>Market</a>] <br>[<a href='../item.php?send=".$item['itemid']."'>Send</a>] [<a href='../item.php?use=".$item['itemid']."'>Use</a>]</center><br>";
echo "</td>\n";
echo "<tr>\n";
}

?>
</table>
</div></div>

 

All the best

 

Keith

 

 

thankyou... its now giving me a error:

 

Fatal error: Call to a member function fetchrow() on a non-object on line 18....

 

which is this bit:

 


$query = $db->execute("SELECT bi.img AS blueprintimg, bi.id AS blueprintid, bi.name AS blueprintname, i.id as itemid FROM player p JOIN (SELECT player_id, MAX(id) AS id, COUNT(id) AS num_items FROM items WHERE player_id = 1) items_sub ON p.id = items_sub.player_id JOIN items i ON items_sub.id = i.id JOIN blueprint_items bi ON i.id = bi.item_id WHERE p.id = ?", array($player->id));

$item = $query->fetchrow();

while($item = $query->fetchrow())
{

 

 

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i went into myphpadmin and went into the sql bit and pasted this exactly:

 

$query = $db->execute("SELECT bi.img AS blueprintimg, bi.id AS blueprintid, bi.name AS blueprintname, i.id as itemid FROM player p JOIN (SELECT player_id, MAX(id) AS id, COUNT(id) AS num_items FROM items WHERE player_id = 1) items_sub ON p.id = items_sub.player_id JOIN items i ON items_sub.id = i.id JOIN blueprint_items bi ON i.id = bi.item_id WHERE p.id = ?", array($player->id));
$item = $query->fetchrow();

 

and it came back with this error:

 

 

Error

 

There seems to be an error in your SQL query. The MySQL server error output below, if there is any, may also help you in diagnosing the problem

 

ERROR: Unknown Punctuation String @ 13

STR: ->

SQL: $query = $db->execute("SELECT bi.img AS blueprintimg, bi.id AS blueprintid, bi.name AS blueprintname, i.id as itemid FROM player p JOIN (SELECT player_id, MAX(id) AS id, COUNT(id) AS num_items FROM items WHERE player_id = 1) items_sub ON p.id = items_sub.player_id JOIN items i ON items_sub.id = i.id JOIN blueprint_items bi ON i.id = bi.item_id WHERE p.id = ?", array($player->id));$query = $db->execute("SELECT bi.img AS blueprintimg, bi.id AS blueprintid, bi.name AS blueprintname, i.id as itemid FROM player p JOIN (SELECT player_id, MAX(id) AS id, COUNT(id) AS num_items FROM items WHERE player_id = 1) items_sub ON p.id = items_sub.player_id JOIN items i ON items_sub.id = i.id JOIN blueprint_items bi ON i.id = bi.item_id WHERE p.id = ?", array($player->id));$query = $db->execute("SELECT bi.img AS blueprintimg, bi.id AS blueprintid, bi.name AS blueprintname, i.id as itemid FROM player p JOIN (SELECT player_id, MAX(id) AS id, COUNT(id) AS num_items FROM items WHERE player_id = 1) items_sub ON p.id = items_sub.player_id JOIN items i ON items_sub.id = i.id JOIN blueprint_items bi ON i.id = bi.item_id WHERE p.id = ?", array($player->id));

 

 

SQL query:

 

$query = $db->execute("SELECT bi.img AS blueprintimg, bi.id AS blueprintid, bi.name AS blueprintname, i.id as itemid FROM player p JOIN (SELECT player_id, MAX(id) AS id, COUNT(id) AS num_items FROM items WHERE player_id = 1) items_sub ON p.id = items_sub.player_id JOIN items i ON items_sub.id = i.id JOIN blueprint_items bi ON i.id = bi.item_id WHERE p.id = ?", array($player->id));

 

MySQL said:

#1064 - You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near '$query = $db->execute("SELECT bi.img AS blueprintimg, bi.id AS blueprintid, bi.n' at line 1

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I can certainly tell you why your test didn't work. The code you pasted contains PHP code, something that would make no sense to PHPMyAdmin since it only parses MySQL.

 

What you would need to put into PHPMyAdmin is something like...

 

SELECT bi.img AS blueprintimg, bi.id AS blueprintid, bi.name AS blueprintname, i.id as itemid FROM player p JOIN (SELECT player_id, MAX(id) AS id, COUNT(id) AS num_items FROM items WHERE player_id = 1) items_sub ON p.id = items_sub.player_id JOIN items i ON items_sub.id = i.id JOIN blueprint_items bi ON i.id = bi.item_id WHERE p.id = ??????????

 

Only replacing ?????????? with a valid p.id

 

Looking at the actual query there is some syntax I don't recognise, but it's not to say they're wrong, my MySQL knowledge isn't especially in-depth, the parts I'm not sure about are...

  • FROM player p
  • JOIN items i
  • JOIN blueprint_items bi

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Copy the SQL, and try it in phpmyadmin or whatever other package you have for MySQL and see what the real error is.

 

i went into myphpadmin and went into the sql bit and pasted this exactly:

 

ONLY post the query and the value passed

SELECT bi.img AS blueprintimg, bi.id AS blueprintid, bi.name AS blueprintname, i.id as itemid 
FROM player p JOIN (
SELECT player_id, MAX(id) AS id, COUNT(id) AS num_items FROM items WHERE player_id = 1
) items_sub ON p.id = items_sub.player_id 
JOIN items i ON items_sub.id = i.id 
JOIN blueprint_items bi ON i.id = bi.item_id 
WHERE p.id = ?

 

replace ? with a player ID

 

Humm not sure about that join

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okay i tried that now i have this error:

 

Error

 

SQL query: Documentation

 

SELECT bi.img AS blueprintimg, bi.id AS blueprintid, bi.name AS blueprintname, i.id AS itemid

FROM player p

JOIN (

 

SELECT player_id, MAX( id ) AS id, COUNT( id ) AS num_items

FROM items

WHERE player_id =1

)items_sub ON p.id = items_sub.player_id

JOIN items i ON items_sub.id = i.id

JOIN blueprint_items bi ON i.id = bi.item_id

WHERE p.id =1

 

MySQL said: Documentation

#1146 - Table 'maf10000_db1.player' doesn't exist

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Well that's strange

Firstly i have 3 Tables in my database; "player", "blueprint_items", "items".

 

okay i tried that now i have this error:

MySQL said: Documentation

#1146 - Table 'maf10000_db1.player' doesn't exist

 

which mean the table 'player' does NOT exist..

 

So what should the table name be ?

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this is what i got:

 

 

MySQL returned an empty result set (i.e. zero rows). (Query took 0.0003 sec)

SQL query:

SELECT bi.img AS blueprintimg, bi.id AS blueprintid, bi.name AS blueprintname, i.id AS itemid

FROM players p

JOIN (

 

SELECT player_id, MAX( id ) AS id, COUNT( id ) AS num_items

FROM items

WHERE player_id =1

)items_sub ON p.id = items_sub.player_id

JOIN items i ON items_sub.id = i.id

JOIN blueprint_items bi ON i.id = bi.item_id

WHERE p.id =1

 

 

upon having a good look at the SQL im noticing a couple of problems... im not good with this so maybe they are supposed to be this way....

 

SELECT bi.img AS blueprintimg, bi.id AS blueprintid, bi.name AS blueprintname, i.id AS itemid

FROM players p

 

from what thats saying is looks like its trying to get img, id and name all from the "players" tables where it should be trying to get it from the "blueprint_items" table.

 

 

 

 

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Hi

 

No, it is getting them from the blueprint table . blueprint_items has been aliased as bi, hence it is selecting bi.img.

 

Do you defiantly have a player with an id of 1 who has some items, and those items have a matching record on the blueprint_items table?

 

All the best

 

Keith

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