Question

我需要一些查询的帮助，该查询将在一个输出上提供两年数据的结果。例如，仅仅比较单位;

查询：

select 
year 1,count(*),
year 2, count(*)
From db
WHERE year1 >= DATEADD(yy,-1,DATEADD(yy,DATEDIFF(yy,0,GETDATE()),0)) 
AND year1 <= DATEADD(MONTH, DATEDIFF(MONTH, 0, GETDATE()) - 12, 0)
AND
year2 >= DATEADD(yy,0,DATEADD(yy,DATEDIFF(yy,0,GETDATE()),0))
AND year2 <= DATEADD(MONTH, DATEDIFF(MONTH, 0, GETDATE()) , 0)

结果视觉：

2016 Units  2017 units
   3000        1200

Answer 1

使用case语句+ sum aggregat，假设yy是你的日期列：

select
    sum(case when '2016' = Year(yy) then 1 else 0 end) as "2016 units",
    sum(case when '2017' = Year(yy) then 1 else 0 end) as "2017 units"
From table

会产生一行：

2016 Units  2017 units
   3000        1200

另一个演示文稿（多行）：

select
    Year(yy) as year,
    count as units
From table
where Year(yy) in (2016,2017)
group by
    Year(yy)

将产生：

year Units
2016 3000
2017 1200

在一个查询中提供两年数据的结果

1 个答案: