对pl/sql 语句的优化（下集）
上集中
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select n5001 门店,n5002 部门,n5004 小分类,n5019 商品编码,c01d21 商品名称,
nvl(xse,0)-nvl(dzxs,0) 销售,
mle 毛利,
nvl(xl,0)-nvl(dzsl,0) 销量
from
(select n5001,n5002,n5004,n5019,sum(n5011) xse,sum(n5016) mle,sum(n5023) xl
from n50
where n5010 between to_date('20100401','yyyymmdd') and to_date('20100430','yyyymmdd')
group by n5001,n5002,n5004,n5019),
(select g08,g09,g02,sum(g03*g07) dzxs,sum(G03) dzsl from batchgoods
where g04 between to_date('20100401','yyyymmdd') and to_date('20100430','yyyymmdd')
group by g08,g09,g02),c01d
where n5001=g08(+)
and n5019=g02(+)
and n5001=c01d00(+)
and n5019=c01d01(+)
SELECT STATEMENT, GOAL = CHOOSE Cost=10163 Cardinality=30832 Bytes=3730672
MERGE JOIN OUTER Cost=10163 Cardinality=30832 Bytes=3730672
MERGE JOIN OUTER Cost=1794 Cardinality=30832 Bytes=2959872
SORT JOIN Cost=1743 Cardinality=30832 Bytes=1880752
VIEW Object owner=FZDC Cost=1098 Cardinality=30832 Bytes=1880752
SORT GROUP BY Cost=1098 Cardinality=30832 Bytes=1171616
TABLE ACCESS BY INDEX ROWID Object owner=FZDC Object name=N50 Cost=668 Cardinality=30832 Bytes=1171616
INDEX RANGE SCAN Object owner=FZDC&n
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