Question

SELECT Count(*) AS MonthTotal
FROM CRMProjects
WHERE CreatedDate between '01 May 2016' and '31 May 2016'

SELECT Count(*) AS YearTotal
FROM CRMProjects
WHERE CreatedDate between '01 Jan 2016' and '31 Dec 2016'

SELECT Count(*) AS MonthNew
FROM CRMProjects
WHERE CreatedDate between '01 May 2016' and '31 May 2016'
AND SystemType = 'O'

SELECT Count(*) AS YearClosed
FROM CRMProjects
WHERE CreatedDate between '01 Jan 2016' and '31 Dec 2016'
AND SystemType = 'C'

它只填充表中的月份，它不会填充其他部分，因为Visual Studio不允许对一个数据集使用多个select语句。

Answer 1

我会建议这样的事情：

SELECT 'Month Total' AS Label, Count(*) AS Value
FROM CRMProjects
WHERE CreatedDate between '01 May 2016' and '31 May 2016'

UNION ALL

SELECT 'Year Total' AS Label, Count(*) AS Value
FROM CRMProjects
WHERE CreatedDate between '01 Jan 2016' and '31 Dec 2016'

UNION ALL

SELECT 'Month New' AS Label, Count(*) AS Value
FROM CRMProjects
WHERE CreatedDate between '01 May 2016' and '31 May 2016'
AND SystemType = 'O'

UNION ALL

SELECT 'Year Closed' AS Label, Count(*) AS Value
FROM CRMProjects
WHERE CreatedDate between '01 Jan 2016' and '31 Dec 2016'
AND SystemType = 'C'

Answer 2

您可以使用SUM(CASE)作为SUMIF的一种......

SELECT
    SUM(CASE WHEN CreatedDate between '01 May 2016' and '31 May 2016' THEN 1 END) AS MonthTotal,
    SUM(1)    AS YearTotal,
    SUM(CASE WHEN CreatedDate between '01 May 2016' and '31 May 2016' AND SystemType = 'O' THEN 1 END) AS MonthNew,
    SUM(CASE WHEN SystemType = 'C' THEN 1 END)    AS YearClosed
FROM
    CRMProjects
WHERE
    CreatedDate between '01 Jan 2016' and '31 Dec 2016'

这确保您只扫描一次表格的相关部分，一次性汇总结果。

Answer 3

将每个计数选为自己的列：

Select 
    (SELECT Count(*) 
       FROM CRMProjects
      WHERE CreatedDate between '01 May 2016' and '31 May 2016') AS MonthTotal,


    (SELECT Count(*) 
       FROM CRMProjects
      WHERE CreatedDate between '01 Jan 2016' and '31 Dec 2016') AS YearTotal,


    (SELECT Count(*)
       FROM CRMProjects
      WHERE CreatedDate between '01 May 2016' and '31 May 2016'
        AND SystemType = 'O')  AS MonthNew,


    (SELECT Count(*) 
       FROM CRMProjects
      WHERE CreatedDate between '01 Jan 2016' and '31 Dec 2016'
        AND SystemType = 'C') AS YearClosed

我可以在SQL中创建一个select语句吗？

3 个答案: