Question

我正在运行查询：

 Select s.scheme, c.surname, p.policynumber, cp.type, ce.TotalReceived   
    from clients c, schemes s, policies p, commnPremiums cp, CommnEntries ce  
    where c.clientref = p.clientref and   
    s.schemeref = p.schemeref and   
    p.policyref = cp.policyref and   
    cp.CommnPremRef = ce.CommnPremRef and   
    s.schemeref = '164003232' and c.surname = 'Smith'

返回以下记录：

scheme surname policynumber type TotalReceived   
AxaElevate Smith XEL123 7 1147.38   
AxaElevate Smith XEL123 7 285.14   
AxaElevate Smith XEL123 7 501.16   
AxaElevate Smith XEL123 1 2688.62   
AxaElevate Smith XEL123 5 149.49   
AxaElevate Smith XEL123 1 94.7   
AxaElevate Smith XEL123 5 163.69   
AxaElevate Smith XEL123 5 166.65

我想将totalReceived按类型相加以产生：

scheme surname policynumber type TotalReceived   
AxaElevate Smith XEL123 7 1933.68   
AxaElevate Smith XEL123 1 2783.32   
AxaElevate Smith XEL123 5 479.83

Answer 1

你需要使用group by和sum：

 Select s.scheme, 
c.surname, 
p.policynumber, 
cp.type, 
sum(ce.TotalReceived   )
    from clients c, schemes s, policies p, commnPremiums cp, CommnEntries ce  
    where c.clientref = p.clientref and   
    s.schemeref = p.schemeref and   
    p.policyref = cp.policyref and   
    cp.CommnPremRef = ce.CommnPremRef and   
    s.schemeref = '164003232' and c.surname = 'Smith'
GROUP BY
s.scheme, 
c.surname, 
p.policynumber, 
cp.type

使用聚合函数（如sum）后，您必须在select中的每个字段上进行聚合或分组。

Answer 2

你可以分组，然后你可以做总和

Select s.scheme, c.surname, p.policynumber,  cp.type, 
   sum(ce.TotalReceived)
from clients c, schemes s, policies p, commnPremiums cp, CommnEntries ce  
where c.clientref = p.clientref and   
s.schemeref = p.schemeref and   
p.policyref = cp.policyref and   
cp.CommnPremRef = ce.CommnPremRef and   
s.schemeref = '164003232' and c.surname = 'Smith'
GROUP BY
  s.scheme, 
  c.surname, 
  p.policynumber, 
  cp.type

与多个表相加

2 个答案: