MySQL Error Occured
1028: Sort aborted

QUERY = SELECT t1.words AS words1, t2.words AS words2, t34.words34 AS words34, t5.words AS words5 FROM (SELECT words FROM for_sale_keywords WHERE `group`=1 ORDER BY RAND() LIMIT 12) AS t1 , (SELECT words FROM for_sale_keywords WHERE `group`=2 ORDER BY RAND() LIMIT 7) AS t2 , (SELECT CONCAT(g3.words, ' ', g4.words) AS words34 FROM for_sale_keywords g3, for_sale_keywords g4 WHERE g3.`group`=3 AND g3.category=g4.category AND g4.`group`=4 ORDER BY RAND() LIMIT 221) AS t34 , (SELECT words FROM for_sale_keywords WHERE `group`=5 ORDER BY RAND() LIMIT 6) t5 ORDER BY RAND() LIMIT 387