使用sql计算已预订的总金额和已收取的总金额

我想显示度假村id、度假村名称、每个度假村的预订数量以及在每个度假村收取的总金额。为此，我有一段代码如下：

select r.resortid, r.resortname, count(b.bookingid) as totalbooking, sum(b.totalcharge) as totalamount
 from resort r inner join booking b 
 on r.resortid = b.resortid  
 group by b.resortid
 order by b.resortid;

---

但是这段代码给出了一个错误，声明“不是一个表达式分组”。请帮我度过难关，并提前感谢

只需添加其他未聚合的列：

select r.resortid, r.resortname,
       count(b.bookingid) as totalbooking, 
       sum(b.totalcharge) as totalamount
from resort r inner join
     booking b 
     on r.resortid = b.resortid  
group by r.resortid, r.resortname
order by r.resortid;

请注意，

groupby

列与

select

中的未聚合列相匹配。特别是，

分组依据

和

排序依据

使用

r.restorid

，而不是

b.restorid

您还可以使用聚合函数：

select r.resortid, max(r.resortname) as resortname,
       count(b.bookingid) as totalbooking, 
       sum(b.totalcharge) as totalamount
from resort r inner join
     booking b 
     on r.resortid = b.resortid  
group by r.resortid
order by r.resortid;