sql 语句优化？寻求帮助，谢谢
SELECT yinshua.orderid, chengpin.ChanChenPengName,chengpin.id, lingliao.zhongliang
AS lingliaozhong, yinshua.ycluse, tui.zhong AS tuiliaozhong,
chengpin.ChanChenPengGuiGe, ordertable.number, yinshua.feimo, yinshua.zhengmo,
yinshua.huansu, yinshua.seshu, yinshua.huankunshu, yinshua.zhengmozhong,
yinshua.fenqie + yinshua.yuanmo + yinshua.chuimo + yinshua.qita + yinshua.feipin + yinshua.zonghe
+ yinshua.zhengmozhong AS feipinzhong, yinshua.producehour,
yinshua.zhuangbanhour, yinshua.tiaosehour, yinshua.zhuanhuanhour,
yinshua.waithour, yinshua.qualityhour, yinshua.repairhour, yinshua.otherhour,
yinshua.banzu, yinshua.producedate, yinshuachanpinku.zhong
AS zhong, yinshuachanpinku.chang AS chang,yinshuachanpinku.mianji AS mianji,
yinshua.feipin + yinshua.zonghe AS banchengpinfeipin,
yinshua.fenqie + yinshua.yuanmo + yinshua.chuimo + yinshua.qita AS yuanliaofeipin,
yinshua.banci, yinshua.jitai, yinshua.cid1, yinshua.cid2, yinshua.cid3, yinshua.cid4,
yinshua.fenqie, yinshua.yuanmo, yinshua.chuimo, yinshua.qita, yinshua.feipin,
yinshua.zonghe, yinshua.maintainhour, yinshua.noorderhour, yinshua.noElehour,
yinshua.beginEle, yinshua.endEle, yinshua.userid, yinshua.userid1
FROM yinshua INNER JOIN ordertable ON yinshua.orderid = ordertable.Orderid INNER JOIN
(SELECT ChanChenPengId AS id, ChanChenPengName, ChanChenPengGuiGe
FROM ChanChenPeng
UNION
SELECT yuancailiaoId AS id, yuancailiaoName AS ChanChenPengName,
cast(yuancailiaohoudu AS varchar(50))
+ '*' + cast(yuancailiaokuandu AS varchar(50)) AS ChanChenPengGuiGe
FROM yuancailiaoInf) chengpin ON
ordertable.chanchenpengid = chengpin.id
LEFT OUTER JOIN
(SELECT producedate,banzu, orderid, SUM(zhong) AS zhong, SUM(chang)
AS chang, SUM(mianji) AS mianji
FROM yinshuachanpinku
GROUP BY producedate,banzu, orderid)
yinshuachanpinku ON
yinshua.orderid = yinshuachanpinku.orderid AND
yinshua.banzu = yinshuachanpinku.banzu and yinshua.producedate=yinshuachanpinku.producedate
LEFT OUTER JOIN
(SELECT orderid, banzu, gongxu, SUM(zhongliang) AS zhong
FROM lingliao
WHERE (state LIKE 't%') AND (ycltmh is not NULL) AND (gongxu = 'ys')
GROUP BY orderid, banzu, gongxu) tui ON
yinshua.orderid = tui.orderid COLLATE Chinese_PRC_CI_AS AND
yinshua.banzu = tui.banzu COLLATE Chinese_PRC_CI_AS
LEFT OUTER JOIN
(SELECT SUM(zhongliang) AS zhongliang, orderid, banzu
FROM lingliao
WHERE (gongxu = 'ys') AND (state = 'y') OR
(state = 'l')
GROUP BY orderid, banzu) lingliao ON
yinshua.banzu = lingliao.banzu COLLATE Chinese_PRC_CI_AS AND
yinshua.orderid = lingliao.orderid COLLATE Chinese_PRC_CI_AS
where (yinshua.producedate = '2009-10-12')