具有多个子查询的ORACLE SQL

我实际上在这个问题中实现了两个方法，一个如下，另一个使用'with'来替代子查询，它们都不起作用。吮吸。这其中，甲骨文一直显示来自padoctors P中的问题具有多个子查询的ORACLE SQL

第2行右外连接 * ERROR： ORA-00936：缺少表达

请帮我与

select distinctive * 
from padoctors p right outer join 
(select drug,month,max(drug_num) max_no 
       from (select drug,count(*) as drug_num,to_char(prescdate,'MM') as month 
        from padoctors 
        where to_char(prescdate,'YYYY')='2012' 
        group by to_char(prescdate,'MM'),drug) 
        group by month,drug) dmax on p.drug=dmax.drug 
full outer join 
    (select drug,month,min(drug_num) min_no 
       from (select drug,count(*) as drug_num,to_char(prescdate,'MM') as month 
        from padoctors 
        where to_char(prescdate,'YYYY')='2012' 
        group by to_char(prescdate,'MM'),drug) 
        group by month,drug) dmin on dmax.month=dmin.month and dmin.drug=p.drug 
order by month asc;

这一个，我google'使用'在http://www.oracle-base.com/articles/misc/with-clause.php 仍然，不工作。

with dmax as 
(
select drug,month,max(drug_num) 
from (select drug,count(*) as drug_num,to_char(prescdate,'MM') as month 
     from padoctors 
     where to_char(prescdate,'YYYY')='2012' 
     group by to_char(prescdate,'MM'),drug 
    ) 
group by month,drug 
), 
dmin as 
(
select drug,month,min(drug_num) 
from (select drug, count(*) as drug_num, to_char(prescdate,'MM') as month 
     from padoctors 
     where to_char(prescdate,'YYYY')='2012' 
     group by to_char(prescdate,'MM'),drug 
    ) 
    group by month,drug 
) 
select distinctive * 
from dmax join dmin on dmax.month=dmin.month 
order by month asc;

来源

2013-02-27 Meteor lin

没有挖进入它，它是选择'DISTINCT'不dinstinctive，你需要一个列表不同的'选择不同的药物，从月' – 2013-02-27 05:04:52

以什么只是Aguy说，我打与和是：
SELECT DISTINCTIVE * FROM Table确实给 “ORA-00936：缺少表达”
所以你需要SELECT DISTINCT

来源

2013-02-27 09:47:33

具有多个子查询的ORACLE SQL

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