C# 在这种情况下，如何使用透视表进行计算？

如何从给定的数据中获得以下结果

报告

-------------------------------------------------
 ID    |    Name          |    Status
-------------------------------------------------
  1    |     A            |    Inprogress
  2    |     A            |    Inprogress
  3    |     A            |    Complete

我需要像这样计算结果

---------------------------------------------
Name    |   Total  | Complete  |  Remaining
---------------------------------------------
   A    |    3     |   1       |    2      

SQL:

---

您不需要使用

PIVOT

操作符。尝试使用

子查询

或

交叉应用

运算符来解决您的任务

;WITH test_data AS(
    SELECT 1 AS id, 'A' AS NAME, 'Inprogress' AS [status]
    UNION ALL
    SELECT 2, 'A', 'Inprogress'
    UNION ALL
    SELECT 3, 'A', 'Complete'
    UNION ALL
    SELECT 4, 'B', 'Complete'
)

SELECT DISTINCT
       name,
       T3.*
FROM test_data AS T
CROSS APPLY (SELECT COUNT(*) AS total,
                    SUM(CASE WHEN T2.status = 'Complete' THEN 1 ELSE 0 END) AS complete, 
                    SUM(CASE WHEN T2.status = 'Inprogress' THEN 1 ELSE 0 END) AS remaining 
             FROM test_data AS T2
             WHERE T2.name = T.name) AS T3

---

您不需要使用

PIVOT

操作符。尝试使用

子查询

或

交叉应用

运算符来解决您的任务

;WITH test_data AS(
    SELECT 1 AS id, 'A' AS NAME, 'Inprogress' AS [status]
    UNION ALL
    SELECT 2, 'A', 'Inprogress'
    UNION ALL
    SELECT 3, 'A', 'Complete'
    UNION ALL
    SELECT 4, 'B', 'Complete'
)

SELECT DISTINCT
       name,
       T3.*
FROM test_data AS T
CROSS APPLY (SELECT COUNT(*) AS total,
                    SUM(CASE WHEN T2.status = 'Complete' THEN 1 ELSE 0 END) AS complete, 
                    SUM(CASE WHEN T2.status = 'Inprogress' THEN 1 ELSE 0 END) AS remaining 
             FROM test_data AS T2
             WHERE T2.name = T.name) AS T3

---

你可以采取几种方法。本例使用。如果您不熟悉这个概念，CASE允许您有条件地返回所选的值。我已将示例数据转换为表变量：

样本数据

/* Creating sample data inside a table variable makes it
 * easy to share.
 */
DECLARE @Sample TABLE
    (
        ID            INT,
        Name        VARCHAR(50),
        [Status]    VARCHAR(50)
    )
;

/* Sample values taken from OP.
 */
INSERT INTO    @Sample
    (
        ID,
        Name,
        [Status]
    )
VALUES
    (1, 'A', 'Inprogress'),
    (2, 'A', 'Inprogress'),
    (3, 'A', 'Complete')
;

案例返回1表示所需状态，0表示所有其他状态。对结果求和可得到小计

/* Using CASE to return conditional sub totals.
 */
SELECT
    Name,
    COUNT([Status])                                                AS Total,
    SUM(CASE WHEN [Status] = 'Complete'    THEN 1 ELSE 0 END)        AS Complete,
    SUM(CASE WHEN [Status] = 'Inprogress'    THEN 1 ELSE 0 END)    AS Remaining
FROM
    @Sample
GROUP BY
    Name
;

---

你可以采取几种方法。本例使用。如果您不熟悉这个概念，CASE允许您有条件地返回所选的值。我已将示例数据转换为表变量：

样本数据

/* Creating sample data inside a table variable makes it
 * easy to share.
 */
DECLARE @Sample TABLE
    (
        ID            INT,
        Name        VARCHAR(50),
        [Status]    VARCHAR(50)
    )
;

/* Sample values taken from OP.
 */
INSERT INTO    @Sample
    (
        ID,
        Name,
        [Status]
    )
VALUES
    (1, 'A', 'Inprogress'),
    (2, 'A', 'Inprogress'),
    (3, 'A', 'Complete')
;

案例返回1表示所需状态，0表示所有其他状态。对结果求和可得到小计

/* Using CASE to return conditional sub totals.
 */
SELECT
    Name,
    COUNT([Status])                                                AS Total,
    SUM(CASE WHEN [Status] = 'Complete'    THEN 1 ELSE 0 END)        AS Complete,
    SUM(CASE WHEN [Status] = 'Inprogress'    THEN 1 ELSE 0 END)    AS Remaining
FROM
    @Sample
GROUP BY
    Name
;