使用表变量获取输出的 SQL 查询加入-数据库问题

SQL query to fetch output using table variables amp; join(使用表变量获取输出的 SQL 查询加入)

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问题描述

我正在编写一个 SQL 查询来获取一个表的数据，并使用多个或嵌套 SQL 语句或使用表变量将其与更多数据连接起来，然后再使用连接.

I am writing a SQL query to fetch the data of one table and join it with some more data either using multiple or nested SQL statements or using table variable and then use join later.

条件是，如果Spends Table中的Medium列是TV，那么在Output TableTV_Spends 应显示电视的 Spends 和该特定市场牌.这同样适用于 Medium Print.

The condition is that if the Medium column in Spends Table is TV then in the Output Table the TV_Spends should show the Spends of TV and that particular market & Brand. And this same is for Medium Print.

另外一个条件是，如果Spends Table中的Type列是CWB，那么该Primary_Brand的Spendscode> 和 Medium 不应用于 TV_Spends 和 Print_Spends 计算.


Also, another condition is that if the Type column in Spends Table is CWB then the Spends of that Primary_Brand and Medium should NOT be used in TV_Spends and Print_Spends calculation.
Total_Spends 是该 Brand_Key 的 TV_Spends 和 Print_Spends 的总和市场
Total_Spends is sum of TV_Spends and Print_Spends for that Brand_Key & Market
支出表
<头>Primary_Brand_Key 中 市场 类型 花费
Kornet 电视 英国 NULL 1000
Kornet 电视 波兰 NULL 2000
Kornet 打印 波兰 NULL 3000
Kornet 打印 NULL CWB 7000
Tamas 电视 英国 NULL 9000
预期产出表
<头>Primary_Brand 市场 TV_Spends Print_Spends Total_Spends
Kornet 英国 1000 NULL 1000
Kornet 波兰 2000 3000 5000
Tamas 英国 9000 NULL 9000
输出即将到来
<头>Primary_Brand 市场 TV_Spends Print_Spends Total_Spends
NULL NULL NULL NULL 1000
NULL NULL NULL NULL 5000
NULL NULL NULL NULL 9000
NULL NULL NULL NULL NULL
NULL NULL NULL 3000 NULL
NULL NULL NULL NULL NULL
NULL NULL 1000 NULL NULL
NULL NULL 2000 NULL NULL
NULL NULL 9000 NULL NULL
NULL 英国 NULL NULL NULL
NULL 波兰 NULL NULL NULL
NULL 英国 NULL NULL NULL
Kornet NULL NULL NULL NULL
Kornet NULL NULL NULL NULL
Tamas NULL NULL NULL NULL
我编写的 SQL 查询给出了 Output Coming 输出，但是输出应该是 Expected Output Table:-
SQL Query I have written which is giving the Output Coming output, However the Output should be Expected Output Table:-
declare @output_table_spends table
(
primary_brand_var nvarchar(255),
market_var nvarchar(255),
tv_spends decimal(11,2),
print_spends decimal(11,2)
total_spends_var  decimal(11,2)
)

Insert into @output_table_spends (primary_brand_var)
select Primary_Brand_Key from
dbo.Spends

Insert into @output_table_spends (market_var)
select Market from
dbo.Spends

Insert into @output_table_spends (tv_spends)
select sum(Amount_Spent_INR) 
  from dbo.Spends
  where medium='TV'
  group by Market
  
  Insert into @output_table_spends (print_spends)
select sum(Amount_Spent_INR) 
  from dbo.Spends
  where medium='Print'
  group by Market
  
  Insert into @output_table_spends (total_spends_var)
select sum(tv_spends,print_spends) 
  from dbo.Spends
  group by Market
  
  select * from dbo.Spends
  
  select distinct A.Primary_Brand_Key, A.Market, 
  B.tv_spends, B.print_spends, B.total_spends_var 
   from dbo.Spends A
  inner join @output_table_spends B
  on A.Primary_Brand_Key=B.primary_brand_var
  group by A.Primary_Brand_Key, A.Market, B.tv_spends, B.print_spends, B.total_spends_var


推荐答案
如果我关注你想要的，你可以使用条件聚合:
If I'm following what you want, you can use conditional aggregation:
select primary_brand_key, market,
       sum(case when medium = 'TV' and type <> 'CWB' then spends else 0 end) as tv,
       sum(case when medium = 'print' and type <> 'CWB' then spends else 0 end) as print,
       sum(spends)
from spends s
group by primary_brand_key, market;

您的问题表明 'CWB' 仅用于 tv 和 print 列.但是，如果您真的想要所有三个都使用它，请改用 where 子句.
Your question suggests that the 'CWB' is only needed for the tv and print columns.  However, if you really want it for all three, then use a where clause instead.

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