Error occurs

Hi,

My current views has the the following sql query:
SELECT node.nid AS nid,
RAND() AS _random
FROM node node
LEFT JOIN node_revisions node_revisions ON node.vid = node_revisions.vid
WHERE UPPER(node_revisions.body) = UPPER('song')
ORDER BY _random ASC

I would like to use Views PHP filter to add the "LIMIT 3" to limit only 3 filtered records, the coding I put in Views PHP filter is as follows:

$result = db_fetch_array(db_query('SELECT node.nid AS nid,
RAND() AS _random
FROM node node
LEFT JOIN node_revisions node_revisions ON node.vid = node_revisions.vid
WHERE UPPER(node_revisions.body) = UPPER('song')
ORDER BY _random ASC LIMIT 3');
return array($result['nid']);

But it returns with error, could you advise what is wrong. Thanks.