列表对于具有最长的运输延迟

Question

列出该具有最长的运输延迟

我尝试以下，但不能显示的顺序发货城市和国家的顺序发货城市和国家：

TRENTON   NJ    4 

作为需要由查询返回的唯一结果。

select shipcity, shipstate, shipdate-orderdate "Shipping Delay" 
from orders 
having max(shipdate-orderdate) >any (select shipdate-orderdate 
       from orders 
       where shipdate is not null) 
group by shipcity, shipstate, shipdate-orderdate; 

Answer 1

假设MySQL的：

select shipcity, shipstate, (shipdate - orderdate) AS "Shipping Delay" 
from orders 
order by "Shipping Delay" desc 
limit 1 

如果你真的坚持子查询，但当然，上述工程：

select shipcity, shipstate, (shipdate - orderdate) AS Shipping_Delay 
from orders 
where shipdate-orderdate = (SELECT MAX(shipdate-orderdate) FROM orders)