以用户为基础获取百分比并按月向下钻取

Question

我想以这种格式打印报告:(这些是样本值）

到目前为止，我能够做到这一点：

这是我的问题：

SELECT t.DisplayName,
        ROUND((CAST(t.MarksObt AS FLOAT)  / CAST(t.TotalMarks AS FLOAT) * 100), 0) AS Percentage,
        t.EvaluationDate
FROM (SELECT u.DisplayName, 
        e.Id,
        SUM(ea.QuestionMaxMarks) AS TotalMarks, 
        SUM(CASE WHEN ea.Achieve = 1 THEN ea.QuestionMaxMarks ELSE 0 END) AS MarksObt,
        e.EvaluationDate
FROM Users u
JOIN Evaluation e
ON u.UserID = e.PhoneBankerId
JOIN EvaluationAnswer ea
ON e.Id = ea.EvaluationId
JOIN Question q
ON ea.QuestionId = q.Id
JOIN QuestionSection qs
ON q.SectionId = qs.Id
WHERE qs.[Type] = 1
AND e.Id > 31
AND ea.Achieve <> 3
GROUP BY e.Id, u.DisplayName, e.EvaluationDate) As t

非常感谢任何帮助。 感谢

Answer 1

您需要使用PIVOT运算符。以下是基于Northwind数据库的示例，该数据库返回每月每个客户的订单总价值信息：

;WITH PivotData AS ( SELECT CustomerID, DATENAME(M,OrderDate) as Month, Freight FROM Orders)
SELECT CustomerID,
    January,February,March,
    April,May,June,
    July,August,September,
    October,November,December
FROM PivotData
PIVOT( SUM(Freight) FOR Month IN 
    (January,February,March,
    April,May,June,
    July,August,September,
    October,November,December) ) AS P;

以下是我使用PIVOT运算符的查询的一般结构：

WITH PivotData AS
(
    SELECT <grouping column>, <spreading column>, <aggregation column>
    FROM <source table>
)
SELECT <select list>
FROM PivotData
PIVOT( <aggregate function >(<aggregation column>)
FOR <spreading column> IN (<distinct spreading values>) ) AS P;

在您的情况下，DisplayName是一个分组列，EvaluationDate的月份部分是一个传播列，而Percentage是一个聚合列。

Answer 2

同样使用DECIMAL而不是FLOAT，浮点数据类型可能会给您带来意想不到的结果，因为它是近似数据类型，只应在使用近似值（如Pi值和质量）时使用地球等。

SELECT DisplayName
      , CAST([JAN] AS VARCHAR(10))+ '%' AS [JAN]
      , CAST([FEB] AS VARCHAR(10))+ '%' AS [FEB]
      , CAST([MAR] AS VARCHAR(10))+ '%' AS [MAR]
      , CAST([APR] AS VARCHAR(10))+ '%' AS [APR]
      , CAST([MAY] AS VARCHAR(10))+ '%' AS [MAY]
      , CAST([JUN] AS VARCHAR(10))+ '%' AS [JUN]
      , CAST([JUL] AS VARCHAR(10))+ '%' AS [JUL]
      , CAST([AUG] AS VARCHAR(10))+ '%' AS [AUG]
      , CAST([SEP] AS VARCHAR(10))+ '%' AS [SEP]
      , CAST([OCT] AS VARCHAR(10))+ '%' AS [OCT]
      , CAST([NOV] AS VARCHAR(10))+ '%' AS [NOV]
      , CAST([DEC] AS VARCHAR(10))+ '%' AS [DEC]
FROM
 ( 
   -- Your query here but get data in following format
    SELECT DisplayName
          ,Percentage 
          ,UPPER(LEFT(DATENAME(MONTH, EvaluationDate), 3)) AS EvaluationDate
    FROM @TABLE
 )t
PIVOT (AVG(Percentage)
       FOR EvaluationDate
       IN ([JAN],[FEB],[MAR],[APR],[MAY],[JUN],[JUL],[AUG],[SEP],[OCT],[NOV],[DEC])
      )p