SQL Server在同一查詢的不同日期執行相同的計算

Question

我有兩個基本相同的查詢，除了一個正在計算一個月迄今的總和，另一個正在計算年迄今總和。我不希望每個員工都有兩個單獨的表格，而是希望每個員工在他們的姓名旁邊都有一個至今爲止的月份和年份至今的列。我試過工會和一些子查詢，但我仍然遇到麻煩。我看了很多資源，但沒有找到我可以使用的東西。

--Query 1: 
SELECT 
    A.EMPLOYEENUMBER AS 'Employee No.', 
    B.ENTITYNAME AS 'Employee Office', 
    B.NAME1 AS 'Employee Information', 
    SUM(A.NUMBEROF) AS 'Ent. Qty' 
FROM prod.DAILYTIMESHEETLINE A 
JOIN prod.EMPLOYEE B on A.EMPLOYEENUMBER = B.EMPLOYEENUMBER 
WHERE A.THEDATE BETWEEN '2017.04.01' AND '2017.04.30' 
GROUP BY A.EMPLOYEENUMBER, B.NAME1, B.ENTITYNAME 
ORDER BY A.EMPLOYEENUMBER 


--Query 2: 
SELECT 
    A.EMPLOYEENUMBER AS 'Employee No.', 
    B.ENTITYNAME AS 'Employee Office', 
    B.NAME1 AS 'Employee Information', 
    SUM(A.NUMBEROF) AS 'Ent. Qty' 
FROM prod.DAILYTIMESHEETLINE A 
JOIN prod.EMPLOYEE B on A.EMPLOYEENUMBER = B.EMPLOYEENUMBER 
WHERE A.THEDATE BETWEEN '2017.01.01' AND '2017.04.30' 
GROUP BY A.EMPLOYEENUMBER, B.NAME1, B.ENTITYNAME 
ORDER BY A.EMPLOYEENUMBER 

Answer 1

試試這個：

SELECT 
    A.EMPLOYEENUMBER AS 'Employee No.', 
    B.ENTITYNAME AS 'Employee Office', 
    B.NAME1 AS 'Employee Information', 
    SUM(case when A.THEDATE BETWEEN '2017.01.01' AND '2017.04.30' then A.NUMBEROF else null end) AS 'Ent. Qty1', 
    SUM(case when A.THEDATE BETWEEN '2017.04.01' AND '2017.04.30' then A.NUMBEROF else null end) AS 'Ent. Qty2' 
FROM prod.DAILYTIMESHEETLINE A 
JOIN prod.EMPLOYEE B on A.EMPLOYEENUMBER = B.EMPLOYEENUMBER 
WHERE A.THEDATE BETWEEN '2017.01.01' AND '2017.04.30' 
GROUP BY A.EMPLOYEENUMBER, B.NAME1, B.ENTITYNAME 
ORDER BY A.EMPLOYEENUMBER 

要當心的地方：我讓 '之間的2017年1月1日' 和 '2017年4月30日'，因爲 '2017年1月1日' < '2017年4月1日'，修改因此;）