【java】：多表关联、排序

SELECT * FROM (
SELECT coll.collection_id, coll.report_id, coll.new_id, news.title,news.abstract_txt,news.url,coll.coll_time FROM tb_collection_report AS coll, tb_news AS news
WHERE coll.collection_id =  #{collectionID,jdbcType=VARCHAR} AND coll.new_id = news.nid
UNION ALL
SELECT coll.collection_id, coll.report_id, coll.new_id, report.title,report.abstract_txt,report.url,coll.coll_time FROM tb_collection_report AS coll, tb_report AS report
WHERE coll.collection_id =  #{collectionID,jdbcType=VARCHAR} AND coll.report_id = report.id
) AS temp
ORDER BY temp.coll_time DESC
LIMIT #{limitStart,jdbcType=INTEGER}, #{limitEnd,jdbcType=INTEGER}