sql中参数过多利用变量替换参数的方法

select
ff.fundsc||-||ff.fundtzfs||-||ff.fundcjfl||-||ff.fundonefl||-||ff.fundtowfl catagory,
sf.scode,replace(sf.fund5,型证券投资基金,)fund5,sf.fund4,sf.fund10,
(select to_date(tradedate,yyyy-MM-dd) from sdc_fundnetassetvalue where scode=sf.scode and tradedate in
(select max(tradedate) from sdc_fundnetassetvalue where scode=sf.scode and to_date(tradedate,yyyyMMdd)>=(to_date(20120801,yyyyMMdd)-10) and tradedate<=20120801) and rownum<2) trdatedate,
(select unitvalue from sdc_fundnetassetvalue where scode=sf.scode and tradedate in
(select max(tradedate) from sdc_fundnetassetvalue where scode=sf.scode and to_date(tradedate,yyyyMMdd)>=(to_date(20120801,yyyyMMdd)-10) and tradedate<=20120801) and rownum<2) fejz,
(select accumulatedunitvalue from sdc_fundnetassetvalue where scode=sf.scode and tradedate in
(select max(tradedate) from sdc_fundnetassetvalue where scode=sf.scode and to_date(tradedate,yyyyMMdd)>=(to_date(20120801,yyyyMMdd)-10) and tradedate<=20120801) and rownum<2) feljjz,
(select f30004_30002 from si_fund_30002 where f_fundcode=sf.scode and f_type=0 and f_tradingdate in
(select max(f_tradingdate) from si_fund_30002 where f_fundcode=sf.scode and to_date(f_tradingdate,yyyyMMdd)>=(to_date(20120801,yyyyMMdd)-10) and f_tradingdate<=20120801) and rownum<2) gqyzjzzzl,
(select f30006_30002 from si_fund_30002 where f_fundcode=sf.scode and f_type=0 and f_tradingdate in
(select max(f_tradingdate) from si_fund_30002 where f_fundcode=sf.scode and to_date(f_tradingdate,yyyyMMdd)>=(to_date(20120801,yyyyMMdd)-10) and f_tradingdate<=20120801) and rownum<2) gqyyjzzzl,
decode((select f30007_30002 from si_fund_30002 where f_fundcode=sf.scode and f_type=0 and f_tradingdate in
(select max(f_tradingdate) from si_fund_30002 where f_fundcode=sf.scode and to_date(f_tradingdate,yyyyMMdd)>=(to_date(20120801,yyyyMMdd)-10) and f_tradingdate<=20120801) and rownum<2),
null,-,to_char((select f30007_30002 from si_fund_30002 where f_fundcode=sf.scode and f_type=0 and f_tradingdate in
(select max(f_tradingdate) from si_fund_30002 where f_fundcode=sf.scode and to_date(f_tradingdate,yyyyMMdd)>=(to_date(20120801,yyyyMMdd)-10) and f_tradingdate<=20120801) and rownum<2),fm999999990.9999)) gqsgyjzzzl,
row_number() over(partition by ff.fundsc||-||ff.fundtzfs||-||ff.fundcjfl||-||ff.fundonefl||-||ff.fundtowfl
order by decode((select f30007_30002 from si_fund_30002 where f_fundcode=sf.scode and f_type=0 and f_tradingdate in
(select max(f_tradingdate) from si_fund_30002 where f_fundcode=sf.scode and to_date(f_tradingdate,yyyyMMdd)>=(to_date(20120801,yyyyMMdd)-10) and f_tradingdate<=20120801) and rownum<2),
null,-,to_char((select f30007_30002 from si_fund_30002 where f_fundcode=sf.scode and f_type=0 and f_tradingdate in
(select max(f_tradingdate) from si_fund_30002 where f_fundcode=sf.scode and to_date(f_tradingdate,yyyyMMdd)>=(to_date(20120801,yyyyMMdd)-10) and f_tradingdate<=20120801) and rownum<2),fm999999990.9999)) desc) sgy,
decode((select f30008_30002 from si_fund_30002 where f_fundcode=sf.scode and f_type=0 and f_tradingdate in
(select max(f_tradingdate) from si_fund_30002 where f_fundcode=sf.scode and to_date(f_tradingdate,yyyyMMdd)>=(to_date(20120801,yyyyMMdd)-10) and f_tradingdate<=20120801) and rownum<2),
null,-,to_char((select f30008_30002 from si_fund_30002 where f_fundcode=sf.scode and f_type=0 and f_tradingdate in
(select max(f_tradingdate) from si_fund_30002 where f_fundcode=sf.scode and to_date(f_tradingdate,yyyyMMdd)>=(to_date(20120801,yyyyMMdd)-10) and f_tradingdate<=20120801) and rownum<2),fm999999990.9999)) gqbnjzzzl,
row_number() over(partition by ff.fundsc||-||ff.fundtzfs||-||ff.fundcjfl||-||ff.fundonefl||-||ff.fundtowfl
order by decode((select f30008_30002 from si_fund_30002 where f_fundcode=sf.scode and f_type=0 and f_tradingdate in
(select max(f_tradingdate) from si_fund_30002 where f_fundcode=sf.scode and to_date(f_tradingdate,yyyyMMdd)>=(to_date(20120801,yyyyMMdd)-10) and f_tradingdate<=20120801) and rownum<2),
null,-,to_char((select f30008_30002 from si_fund_30002 where f_fundcode=sf.scode and f_type=0 and f_tradingdate in
(select max(f_tradingdate) from si_fund_30002 where f_fundcode=sf.scode and to_date(f_tradingdate,yyyyMMdd)>=(to_date(20120801,yyyyMMdd)-10) and f_tradingdate<=20120801) and rownum<2),fm999999990.9999)) desc) bn,
decode((select F30017_30003 from si_fund_30003 where f_fundcode=sf.scode and f_type=0 and f_tradingdate in
(select max(f_tradingdate) from si_fund_30003 where f_fundcode=sf.scode and to_date(f_tradingdate,yyyyMMdd)>=(to_date(20120801,yyyyMMdd)-10) and f_tradingdate<=20120801) and rownum<2),
null,-,to_char((select F30017_30003 from si_fund_30003 where f_fundcode=sf.scode and f_type=0 and f_tradingdate in
(select max(f_tradingdate) from si_fund_30003 where f_fundcode=sf.scode and to_date(f_tradingdate,yyyyMMdd)>=(to_date(20120801,yyyyMMdd)-10) and f_tradingdate<=20120801) and rownum<2),fm999999990.9999)) jinnian,
row_number() over(partition by ff.fundsc||-||ff.fundtzfs||-||ff.fundcjfl||-||ff.fundonefl||-||ff.fundtowfl
order by decode((select F30017_30003 from si_fund_30003 where f_fundcode=sf.scode and f_type=0 and f_tradingdate in
(select max(f_tradingdate) from si_fund_30003 where f_fundcode=sf.scode and to_date(f_tradingdate,yyyyMMdd)>=(to_date(20120801,yyyyMMdd)-10) and f_tradingdate<=20120801) and rownum<2),
null,-,to_char((select F30017_30003 from si_fund_30003 where f_fundcode=sf.scode and f_type=0 and f_tradingdate in
(select max(f_tradingdate) from si_fund_30003 where f_fundcode=sf.scode and to_date(f_tradingdate,yyyyMMdd)>=(to_date(20120801,yyyyMMdd)-10) and f_tradingdate<=20120801) and rownum<2),fm999999990.9999)) desc) jn,
decode((select f30009_30002 from si_fund_30002 where f_fundcode=sf.scode and f_type=0 and f_tradingdate in
(select max(f_tradingdate) from si_fund_30002 where f_fundcode=sf.scode and to_date(f_tradingdate,yyyyMMdd)>=(to_date(20120801,yyyyMMdd)-10) and f_tradingdate<=20120801) and rownum<2),
null,-,to_char((select f30009_30002 from si_fund_30002 where f_fundcode=sf.scode and f_type=0 and f_tradingdate in
(select max(f_tradingdate) from si_fund_30002 where f_fundcode=sf.scode and to_date(f_tradingdate,yyyyMMdd)>=(to_date(20120801,yyyyMMdd)-10) and f_tradingdate<=20120801) and rownum<2),fm999999990.9999)) gqynjzzzl,
row_number() over(partition by ff.fundsc||-||ff.fundtzfs||-||ff.fundcjfl||-||ff.fundonefl||-||ff.fundtowfl
order by decode((select f30009_30002 from si_fund_30002 where f_fundcode=sf.scode and f_type=0 and f_tradingdate in
(select max(f_tradingdate) from si_fund_30002 where f_fundcode=sf.scode and to_date(f_tradingdate,yyyyMMdd)>=(to_date(20120801,yyyyMMdd)-10) and f_tradingdate<=20120801) and rownum<2),
null,-,to_char((select f30009_30002 from si_fund_30002 where f_fundcode=sf.scode and f_type=0 and f_tradingdate in
(select max(f_tradingdate) from si_fund_30002 where f_fundcode=sf.scode and to_date(f_tradingdate,yyyyMMdd)>=(to_date(20120801,yyyyMMdd)-10) and f_tradingdate<=20120801) and rownum<2),fm999999990.9999)) desc) gqyn,
decode((select f30010_30002 from si_fund_30002 where f_fundcode=sf.scode and f_type=0 and f_tradingdate in
(select max(f_tradingdate) from si_fund_30002 where f_fundcode=sf.scode and to_date(f_tradingdate,yyyyMMdd)>=(to_date(20120801,yyyyMMdd)-10) and f_tradingdate<=20120801) and rownum<2),
null,-,to_char((select f30010_30002 from si_fund_30002 where f_fundcode=sf.scode and f_type=0 and f_tradingdate in
(select max(f_tradingdate) from si_fund_30002 where f_fundcode=sf.scode and to_date(f_tradingdate,yyyyMMdd)>=(to_date(20120801,yyyyMMdd)-10) and f_tradingdate<=20120801) and rownum<2),fm999999990.9999)) gqlnjzzzl,
row_number() over(partition by ff.fundsc||-||ff.fundtzfs||-||ff.fundcjfl||-||ff.fundonefl||-||ff.fundtowfl
order by decode((select f30010_30002 from si_fund_30002 where f_fundcode=sf.scode and f_type=0 and f_tradingdate in
(select max(f_tradingdate) from si_fund_30002 where f_fundcode=sf.scode and to_date(f_tradingdate,yyyyMMdd)>=(to_date(20120801,yyyyMMdd)-10) and f_tradingdate<=20120801) and rownum<2),
null,-,to_char((select f30010_30002 from si_fund_30002 where f_fundcode=sf.scode and f_type=0 and f_tradingdate in
(select max(f_tradingdate) from si_fund_30002 where f_fundcode=sf.scode and to_date(f_tradingdate,yyyyMMdd)>=(to_date(20120801,yyyyMMdd)-10) and f_tradingdate<=20120801) and rownum<2),fm999999990.9999)) desc) gqln,
decode((select f30011_30002 from si_fund_30002 where f_fundcode=sf.scode and f_type=0 and f_tradingdate in
(select max(f_tradingdate) from si_fund_30002 where f_fundcode=sf.scode and to_date(f_tradingdate,yyyyMMdd)>=(to_date(20120801,yyyyMMdd)-10) and f_tradingdate<=20120801) and rownum<2),
null,-,to_char((select f30011_30002 from si_fund_30002 where f_fundcode=sf.scode and f_type=0 and f_tradingdate in
(select max(f_tradingdate) from si_fund_30002 where f_fundcode=sf.scode and to_date(f_tradingdate,yyyyMMdd)>=(to_date(20120801,yyyyMMdd)-10) and f_tradingdate<=20120801) and rownum<2),fm999999990.9999)) gqsnjzzzl

from
(select
b.scode,b.fund5,b.fund4,b.fund10
from
sdc_fundbase b left join sdc_security a on b.scode=a.scode and b.mktcode=a.mktcode and b.fund49=a.stype
where
b.scode in (select t.fundcode from fund_fundcategoryone t where (t.fundtzfs=开放式 or t.fundtzfs=封闭式) and t.fundonefl!=货币市场基金 and t.fundonefl!=交易类 )
and (a.enddate>=to_date(20120801,yyyy-MM-dd) or a.enddate is null or a.enddate=to_date(19000101,yyyy-MM-dd))
and a.stype in (6,7) order by scode
) sf
left join fund_fundcategoryone ff on sf.scode = ff.fundcode and ff.fundonefl!=交易类