Question

有没有办法使用Pivot包含空值的行？

理想情况下，我想要像这样的输出

然而，目前Pivot并没有返回空行，我正在获得这样的输出

我正在使用下面的代码获取结果集：

SELECT
    ID,
    Name,
    Design,
    month
FROM (SELECT
    E.EnrollId AS ID,
    E.EmployeeName AS Name,
    D.Designation AS
    Design,
    DATENAME(MONTH, La.Date) AS month,
    DATENAME(DAY, La.Date) AS Day,
    L.LeaveShortName AS Short
FROM Employee E
JOIN LeaveApplicationDates LA
    ON E.EnrollId = LA.EnrollId
JOIN Leave L
    ON L.LeaveId = LA.LeaveId
JOIN Designation D
    ON E.DesignationId = D.DesignationId
WHERE (E.EnrollId = '10277')
AND (La.Date BETWEEN '1/1/2016' AND '8/1/2016')) AS setr
PIVOT
(
MAX(Short)
FOR [Day] IN ([1], [2], [3], [4], [5], [6], [7], [8], [9], [10],
[11], [12], [13], [14], [15], [16], [17], [18], [19], [20],
[21], [22], [23], [24], [25], [26], [27], [28], [29], [30], [31])
) AS pivotTable

I follow this but solution not working

Answer 1

您可以使用CTE获取包含月份名称的表格：

;WITH cte AS (
    SELECT  CAST('2016-01-01' as datetime) as d
    UNION ALL
    SELECT  DATEADD(month,1,d)
    FROM cte
    WHERE DATEPART(month,d) < 12
)

SELECT  DATEPART(month,d) as month_num,
        DATENAME(month,d) as month_name
FROM cte

输出：

month_num   month_name
1           January
2           February
3           March
4           April
5           May
6           June
7           July
8           August
9           September
10          October
11          November
12          December

并将其放入您的查询中，例如：

;WITH cte AS (
    SELECT  CAST('2016-01-01' as datetime) as d
    UNION ALL
    SELECT  DATEADD(month,1,d)
    FROM cte
    WHERE DATEPART(month,d) < 12
)

SELECT  ID,
        Name,
        Design,
        [month],
        [1], [2], [3], [4], [5], [6], [7], [8], [9], [10],
[11], [12], [13], [14], [15], [16], [17], [18], [19], [20],
[21], [22], [23], [24], [25], [26], [27], [28], [29], [30], [31]
FROM (
    SELECT  E.EnrollId AS ID,
            E.EmployeeName AS Name,
            D.Designation AS
            Design,
            month_num,
            month_name AS [month],
            DATENAME(DAY, La.[Date]) AS [Day],
            L.LeaveShortName AS Short
    FROM Employee E
    CROSS JOIN (
        SELECT  DATEPART(month,d) as month_num,
                DATENAME(month,d) as month_name
        FROM cte
        ) as mt
    LEFT JOIN LeaveApplicationDates LA
        ON E.EnrollId = LA.EnrollId and mt.month_name = DATENAME(MONTH, La.[Date]) and La.[Date] BETWEEN '1/1/2016' AND '8/1/2016'
    LEFT JOIN Leave L
        ON L.LeaveId = LA.LeaveId
    LEFT JOIN Designation D
        ON E.DesignationId = D.DesignationId
) AS setr
PIVOT
(
MAX(Short)
FOR [Day] IN ([1], [2], [3], [4], [5], [6], [7], [8], [9], [10],
[11], [12], [13], [14], [15], [16], [17], [18], [19], [20],
[21], [22], [23], [24], [25], [26], [27], [28], [29], [30], [31])
) AS pivotTable
WHERE ID = '10277'
ORDER BY ID, month_num

SQL Pivot - 如何显示具有空值的所有行？

1 个答案: