Question

我有两个select语句，都有一些共同的字段。

这是我的表结构：

Id, year, valueA, ValueB

这是我的两个选择陈述

SELECT 
    id, [year],
    SUM(Total_Volume) / (count(distinct(month)) * 7) 
FROM
    TableA  
GROUP BY
    id, [year]

和

SELECT
    id, [year],
    SUM(Total_volume) / (count(distinct(month)) * 5)
FROM
    TableA  
WHERE 
    weekday NOT IN ('Friday','Saturday') 
GROUP BY 
    station_id, [year]

我对两个陈述有两个不同的条件。 Id和year对于这两个陈述都很常见。

第一个select语句的结果应存储在valueA列中，第二个select语句的结果应存储在ValueB中。

任何可能的方法来组合这些查询并将它们作为单个语句插入表中？

Answer 1

SELECT  a.id ,a.[year],valA,valB
from(
SELECT id ,[year],SUM(Total_Volume)/ (count(distinct(month))*7) valA from TableA  
group by id,[year]) a INNER JOIN

(select id,[year],SUM(Total_volume)/(count(distinct(month))*5) valB
from TableA  
WHERE weekday NOT IN ('Friday','Saturday') 
group by station_id,[year]) b
on a.id=b.id and a.[year]=b.[year]

Answer 2

您可以在单个查询中进行两项计算

SELECT id, 
   [year], 
   Sum(total_volume) / ( Count(DISTINCT( Month)) * 7 ), 
   Sum(CASE 
         WHEN weekday NOT IN ('Friday', 'Saturday' ) THEN 
         total_volume 
         ELSE 0 
       END) / (Count(DISTINCT( Month)) * 5 ) 
FROM   tableA 
GROUP  BY id, 
      [year];

在一行中插入两个选择查询

2 个答案: