如何组合这些表？ [关闭]答案

【问题标题】：How do I combine these tables? [closed]如何组合这些表？ [关闭]
【发布时间】：2021-10-01 07:17:30
【问题描述】：

我的目标是制作一个 5 x 5 的表格，如下所示：

State	MostRE	MostNRE	LeastRE	LeastNRE
WA	4499698	blank	blank	blank
TX	blank	91590135	blank	blank
DC	blank	blank	4780	blank
DC	blank	blank	blank	438130

我已经分别找到了查询：

select re.state, max(TotalrenewableE) as Most_RE
from #temp_RE as re
Inner join(
select max(TotalRenewableE) TotalRE
from #temp_RE)MaxTRE
On MaxTRE.TotalRE = RE.TotalRenewableE
Group by re.state 


select nre.state, max(TotalNonrenewableE) as Most_NRE
from #temp_NonRE as nre
Inner join(
select max(totalnonrenewablee) TotalNRE
from #temp_NonRE)MaxTNRE
On MaxTNRE.TotalNRE = NRE.TotalNonrenewableE
Group by nre.state



select re.state, min(TotalrenewableE) as Least_RE
from #temp_RE as re
Inner join(
select min(TotalRenewableE) TotalRE
from #temp_RE)MinTRE
On MinTRE.TotalRE = RE.TotalRenewableE
Group by re.state 



select nre.state, min(TotalNonrenewableE) as Least_NRE
from #temp_NonRE as nre
Inner join(
select min(totalnonrenewablee) TotalNRE
from #temp_NonRE)MinTNRE
On MinTNRE.TotalNRE = NRE.TotalNonrenewableE
Group by nre.state

我试过了：

select nre.state, 
min(TotalNonrenewableE) as Least_NRE,
min(TotalRenewableE) as Least_RE,
max(TotalNonrenewableE) as Most_NRE, 
max(TotalRenewableE) as Most_RE,
from #temp_NonRE as nre, #temp_RE as re
Inner Join(
select min(totalnonrenewablee) TotalNRE
from #temp_NonRE)MinTNRE
On MinTNRE.TotalNRE = #temp_NonRE.TotalNonrenewableE
Inner Join(
select min(TotalRenewableE) TotalRE
from #temp_RE)MinTRE
On MinTRE.TotalRE = RE.TotalRenewableE
Inner Join(
select max(totalnonrenewablee) TotalNRE
from #temp_NonRE)MaxTNRE
On MaxTNRE.TotalNRE = #temp_NonRE.TotalNonrenewableE
Inner Join(
select max(TotalRenewableE) TotalRE
from #temp_RE)MaxTRE
On MaxTRE.TotalRE = RE.TotalRenewableE
Where nre.State = re.State
Group by nre.state

但它给了我这个错误：

无法绑定多部分标识符“#temp_NonRE.TotalNonrenewableE”。

我只是不知道如何将它们组合成上面的表格。

感谢您的辛勤工作

【问题讨论】：

你不知道是哪一行导致了错误吗？
MinTNRE.TotalNRE = #temp_NonRE.TotalNonrenewableE，您为临时表指定了别名，因此现在只能由该别名引用。您为另一个临时表执行此操作，所以我投票以错字关闭
另外，你不应该使用逗号分隔的连接语法，而应该使用join...on。而且你绝对不应该混合这两种形式
我不知道错误来自哪里。我认为这是因为每一行都没有填满每一列，但我不知道如何说如果没有值则为空白。但我再次不确定这是否是问题

标签： mysql sql join

【解决方案1】：

再次联合所有并分组

select state, max(Most_RE) Most_RE, max(Most_NRE) Most_NRE, max(LeastRE) LeastRE, max(LeastNRE) LeastNRE  
from (
    select re.state, max(TotalrenewableE) as Most_RE, null Most_NRE, null LeastRE, null LeastNRE
    from #temp_RE as re
    Inner join(
    select max(TotalRenewableE) TotalRE
    from #temp_RE)MaxTRE
    On MaxTRE.TotalRE = RE.TotalRenewableE
    Group by re.state 
    
    union all
    
    select nre.state, null, max(TotalNonrenewableE) as Most_NRE, null, null
    from #temp_NonRE as nre
    Inner join(
    select max(totalnonrenewablee) TotalNRE
    from #temp_NonRE)MaxTNRE
    On MaxTNRE.TotalNRE = NRE.TotalNonrenewableE
    Group by nre.state
    
    ...
)
group by state

【讨论】：

这适用于一些小的改动；在 first from 中添加 #temp_RE 作为 re，将子查询命名为 x。添加 where x.state = re.state