Drupal-based SQL query through PHP: count t1 join t2 - php

Question

I have two tables like so:
table {node}
`nid`, `uid`, `type`
1 1 basketball
2 1 basketball
3 1 football
4 2 football
5 2 basketball
table {strato_ticket}
`tid`, `author_uid`, `purpose`, `active`
1 1 'Ticket to a basketball game' TRUE
2 1 'Ticket to a football game' TRUE
3 2 'Ticket to a football game' FALSE
I'd like to generate a report that counts the number of each kind of node, and then counts the number of active tickets that each user has associated with that kind of node.
My solution uses a combination of SQL and PHP: I have a PHP loop for each kind of node that I'm interested in, which simplifies the SQL query, and translates from 'type' to 'purpose', eg
$node_types = array('basketball', 'football');
foreach($node_types as $node){
switch($type){
case 'basketball':
$purpose = array('Ticket to a basketball node');
break;
case 'football':
$purpose = array('Ticket to a football game');
break;
}
$where = " WHERE ({strato_ticket}.`purpose` = '"
.implode("' OR {strato_ticket}.`purpose` = '",$purpose)."')";
Finally I have the trouble spot, the SQL query. When I was just counting nodes owned by each user, it worked fine:
$query = "
SELECT uid, count( * ) AS nodes_owned
FROM {node} WHERE `type` = '$type'
GROUP BY uid ORDER BY nodes_owned DESC
";
$query = db_query($query);
output:
Now displaying info for basketball.
uid nodes_owned
1 2
2 1
Now displaying info for football.
uid nodes_owned
1 1
2 1
But now that I need to query against another table, strato_ticket, things get complicated, and my query is returning FALSE without throwing an error (I think).
$query = "
SELECT count(*) as tickets
FROM {strato_ticket} INNER JOIN (
SELECT node.uid, count( * ) AS nodes_owned
FROM {node} WHERE `type` = '$type'
GROUP BY uid
) AS {nodecount}
ON {strato_ticket}.`author_uid` = {nodecount}.`uid`
$where
GROUP BY nodecount.uid ORDER BY nodecount.nodes_owned DESC
";
$query = db_query($query);
I'm not very good with SQL and I'm not quite sure how it's broken. Could use a little help?
Ideally would like to see
uid nodes_owned tickets
//basketball
1 2 1
2 1 0
//football
1 1 1
2 1 0

Answer 1

Aside from the placeholders, which I can get to later, I think this solves it.
$form = array();
$node_types = array('basketball','football');
// if($user->uid == 1){
$form[$type][] = array('#value'=>"Showing how many of each node type each user owns.".'<br/>');
foreach($node_types as $type){
// Count the number of nodes each user owns of $type.
$form[$type][] = array('#value'=>"Now displaying info for $type".'s. <br/>');
switch($type){
case 'basketball':
$purpose = array('ticket to a basketball game', 'basketball');
break;
case 'football':
$purpose = array('ticket to a football game');
break;
}
$purpose = implode("', '", $purpose);
//#todo : Make a temporary table to query against so I'm not hitting node table multiple times.
$ticketquery = "
SELECT author_uid, purpose, COUNT( * ) AS invitees_accepted
FROM {strato_ticket}
WHERE purpose IN ('$purpose')
GROUP BY author_uid, `purpose`
";
$nodequery = "
SELECT node.uid, count( * ) AS nodes_owned, type
FROM {node}
WHERE `type` IN ('$type')
GROUP BY uid, type";
$query = "
SELECT * FROM
($nodequery) AS nt
JOIN
($ticketquery) AS tt
ON nt.uid = tt.author_uid
GROUP BY nt.uid ORDER BY nt.nodes_owned DESC
";
drupal_set_message('Query is <br/>'.$query);
//return;
$query = db_query($query);
$first = true;
while ($rec = db_fetch_object($query)){
if($first){
$form[$type][] = array('#value'=>"And the winner is: ".print_r($rec, true).'<br/>');
$first = false;
}
else {
$form[$type][] = array('#value'=>print_r($rec, true).'<br/>');
}
}
// }
}