使用不同的字段名称

Question

目前我有两个问题如下。

我有两个字段CUSTOM6和CUSTOM8。

它们都存储了可以分配给客户的不同计划ID（客户在custom6和custom8中始终都有planID）

我想基本上对每个计划ID的不同客户总数进行计数。所以，我真的希望能够将以下两个查询结果加入到单个输出中。

我已经了解了其他堆栈溢出主题＆amp;已经看过联盟了。不过，这对我没用。

你可以告诉我吗？

由于

查询1

SELECT custom8 as plan, custom1 as billingplatform, count(distinct MSISDN)as msisdn,
CASE 
WHEN custom1 = 'DISE' then 'Business'
WHEN custom1 = 'CUK' then 'Consumer'
end as BusinessConsumer,

CASE 
WHEN instr(custom8, 'ROW') = True then 'ROW'
end as Region

from kkudrfeed2
Group by custom8, custom1

AND 查询2

SELECT custom6 as plan, custom1 as billingplatform, count(distinct MSISDN)as msisdn,
CASE 
WHEN custom1 = 'DISE' then 'Business'
WHEN custom1 = 'CUK' then 'Consumer'
end as BusinessConsumer,
CASE 
WHEN instr(custom6, 'DOM') = True then 'DOM'
end as Region
from kkudrfeed2
Group by custom6, custom1;

两个查询的输出如下。我基本上需要查询2（使用字段custom6）直接位于查询1（带字段custom8）下作为单个表。

Answer 1

Union会为您提供相同billingplatform的单独行，但是，这显然不是您的意图。这就是你在理论上如何实现它的目的：

select c1, c2
from (query1) t1
join (query2) t2
on t1.something = t2.something

让我们在实践中应用这个：

select t1.billingplatform, t1.plan as t1plan, t2.plan as t2plan, t1.msisdn + t2.msisdn as msisdn
from
(SELECT custom8 as plan, custom1 as billingplatform, count(distinct MSISDN)as msisdn,
CASE 
WHEN custom1 = 'DISE' then 'Business'
WHEN custom1 = 'CUK' then 'Consumer'
end as BusinessConsumer,

CASE 
WHEN instr(custom8, 'ROW') = True then 'ROW'
end as Region

from kkudrfeed2
Group by custom8, custom1) t1
(SELECT custom6 as plan, custom1 as billingplatform, count(distinct MSISDN)as msisdn,
CASE 
WHEN custom1 = 'DISE' then 'Business'
WHEN custom1 = 'CUK' then 'Consumer'
end as BusinessConsumer,
CASE 
WHEN instr(custom6, 'DOM') = True then 'DOM'
end as Region
from kkudrfeed2
Group by custom6, custom1) t2
on t1.billingplatform = t2.billingplatform

请注意，此查询将忽略t1或t2没有其他对应对的记录，因此您可能希望使用外连接，将msisdn默认为0在主select子句中。

我很可能误解了这个问题。在这种情况下，我想请求进一步澄清。

修改

由于提问者提供了进一步的信息，我意识到在这种情况下我们不需要使用联接，而是在这种情况下需要结合。

(SELECT custom8 as plan, custom1 as billingplatform, count(distinct MSISDN)as msisdn,
CASE 
WHEN custom1 = 'DISE' then 'Business'
WHEN custom1 = 'CUK' then 'Consumer'
end as BusinessConsumer,

CASE 
WHEN instr(custom8, 'ROW') = True then 'ROW'
end as Region

from kkudrfeed2
Group by custom8, custom1)
union all
(SELECT custom6 as plan, custom1 as billingplatform, count(distinct MSISDN)as msisdn,
CASE 
WHEN custom1 = 'DISE' then 'Business'
WHEN custom1 = 'CUK' then 'Consumer'
end as BusinessConsumer,
CASE 
WHEN instr(custom6, 'DOM') = True then 'DOM'
end as Region
from kkudrfeed2
Group by custom6, custom1)
order by billingplatform

我现在没时间用MySQL测试这个，所以如果有任何问题，请告诉我。

Answer 2

两个查询都会为每个'plan'和billingplatform生成一行。我猜你的问题是每个'计划'都有不同的域名，所以你只能加入计费平台。只在计费平台上加入将无法满足您的需求，因为您将获得计划的跨产品。 在这种情况下，您需要做的是将计划转换为同一个域。 假设计划代码由区域前缀和计划大小组成，并且您希望加入计划大小，则可以尝试修改您的查询：

SELECT substr(custom6,4) as plan_size, custom1 as billingplatform, count(distinct MSISDN)as msisdn,
CASE 
WHEN custom1 = 'DISE' then 'Business'
WHEN custom1 = 'CUK' then 'Consumer'
end as BusinessConsumer,
CASE 
WHEN instr(custom6, 'DOM') = True then 'DOM'
end as Region
from kkudrfeed2
Group by custom6, custom1;