| 标题 | sql中参数过多利用变量替换参数的方法 |
| 范文 | 工作中遇到一个需求，需要非常多的参数，例如如下sql， 代码如下: 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' 非常复杂，不仔细介绍，此时需要将20120801处全部变成参数传入，，只写参数就得累死我，下面方法可以节省我的好多工作量，在最内部函数中修改select b.scode,b.fund5,b.fund4,b.fund10,20120801 tdate from 将20120801用tdate变量来代替，这样传入的参数就用tdate来表示就可以了。 |
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