在SQL Server中查找两个季度之间的记录

Question

我想在SQL Server中查找不同年份的两个季度之间的记录。

SELECT    ('Q'+cast(DATEPART(QUARTER,calldate) as varchar(3))+'-'+cast(YEAR(calldate) as varchar(4)))
period,providerid,volume as volume,type  
FROM  table V    
where DATEPART(QUARTER,calldate) between @Q1 and @Q2 and                             
datepart(year,calldate) in (@Y1,@Y2)  and providerid=@carrierID  

这里Q1=4, Q2=3， @Y1=2014，@Y2=2016

 Now,I have only records from Q2-2016, So it should return available records      
 but I am getting blank rows.
 if I change the parameter like this 
 Here Q1=3 and Q2=4 and @Y1=2014,@Y2=2016 then i am getting records.

我想要这两个季度之间的所有记录，比如(2014年第三季度和2016年第二季度)。

Answer 1

这里有一个方法:

where datename(year, calldate) + datename(quarter, calldate)
          between @Y1 + @Q1 and @Y2 + @Q2;

这里假设变量实际上是字符串。您也可以使用数字:

where datepart(year, calldate) * 10 + datename(quarter, calldate)
          between @Y1 * 10 + @Q1 and @Y2 * 10 + @Q2;

还有，这里有一种使用索引的方法:

where calldate >= datefromparts(@Y1, @Q1*3 - 2, 1) and
      calldate < (case when @Q2 = 4
                       then datefromparts(@Y2 + 1, 1, 1)
                       else datefromparts(@Y2, @Q2*3 - 2 + 3, 1)
                  end)

Answer 2

可以尝试这样做

SELECT    
 ('Q'+cast(DATEPART(QUARTER,calldate) as varchar(3))+'-'+cast(YEAR(calldate) as varchar(4)))
period,providerid,volume as volume,type  
FROM  table V    
where DATEPART(QUARTER,calldate) + datepart(year,calldate) *4  between @Q1 + @Y1 * 4  and @Q2 + @Y2 * 4