选择日期范围，根据关闭条件计算范围内的多条记录，按班次分组

Question

所以我是 SQL World 的新手，所以请原谅这个问题可能是多么无知。我最终可能需要为此执行一个存储过程，但在进入下一步之前尝试让它在查询中工作。

我正在尝试执行以下操作：

1. 选择特定日期之间的记录

2. 计算 where 语句中给定条件的记录。我有 6 条不同的记录要计数，每次计数都需要一个新列。

3. 然后我想按 A 或 B 分组

我可以像下面这样计算记录。

     SELECT        (SELECT        COUNT(*) AS 6F
                      FROM            dbo.1_Data
                      WHERE        ([B] BETWEEN 1 AND 9) AND (Time BETWEEN CONVERT(DATETIME, '2014-01-01 00:00:00', 102) AND CONVERT(DATETIME, 
                                                '2014-02-01 00:00:00', 102))) AS 6F,
                         (SELECT        COUNT(*) AS 5E
                           FROM            dbo.1_Data AS 1_Data_1
                           WHERE        ([B] = 10) AND (Time BETWEEN CONVERT(DATETIME, '2014-01-01 00:00:00', 102) AND CONVERT(DATETIME, '2014-02-01 00:00:00',
                                                      102))) AS 5E,
                         (SELECT        COUNT(*) AS 4D
                           FROM            dbo.1_Data AS 1_Data_2
                           WHERE        ([B] BETWEEN 11 AND 13) AND (Time BETWEEN CONVERT(DATETIME, '2014-01-01 00:00:00', 102) AND CONVERT(DATETIME, 
                                                     '2014-02-01 00:00:00', 102))) AS 4D,
                         (SELECT        COUNT(*) AS 1A
                           FROM            dbo.1_Data AS 1_Data_3
                           WHERE        ([B] = 14) AND (Time BETWEEN CONVERT(DATETIME, '2014-01-01 00:00:00', 102) AND CONVERT(DATETIME, '2014-02-01 00:00:00',
                                                      102))) AS 1A,
                         (SELECT        COUNT(*) AS 2B
                           FROM            dbo.1_Data AS 1_Data_4
                           WHERE        ([A Step] BETWEEN 1 AND 25) AND (Time BETWEEN CONVERT(DATETIME, '2014-01-01 00:00:00', 102) AND CONVERT(DATETIME, 
                                                     '2014-02-01 00:00:00', 102))) AS 2B,
                         (SELECT        COUNT(*) AS 3C
                           FROM            dbo.1_Data AS 1_Data_5
                           WHERE        ([B Step] = 0) AND ([ A Step] = 0) AND (Time BETWEEN CONVERT(DATETIME, '2014-01-01 00:00:00', 102) AND 
                                                     CONVERT(DATETIME, '2014-02-01 00:00:00', 102))) AS 3C

我可以这样做以获取时间范围内给定步骤中的记录数并进行分组。

    SELECT COUNT([B]) AS [1A], Letter

    FROM  dbo.1_Data

    WHERE (Time BETWEEN CONVERT(DATETIME, '2014-01-05 00:00:00', 102) AND CONVERT(DATETIME, '2014-01-10 00:00:00', 102)) AND ([B] = 14)

    GROUP BY Letter

我正在寻找与此类似的最终结果。列名在顶部，记录数在其下方。

1A 的列，A 的记录计数和 B 的计数。

|1A |信 |

---

|34 |一个 |

---

|93 |乙|

如何将所有这些合并到一个查询语句中，以便在给定的日期范围和条件内整理出数据，然后按字母分组？

Answer 1

我仍然对你想要什么感到困惑，但我认为你需要这个

SELECT COUNT(CASE WHEN ( [B] BETWEEN 1 AND 9 )
                       AND ( [Time] BETWEEN '2014-01-01 00:00:00' AND '2014-02-01 00:00:00' ) THEN 1
                  ELSE NULL
             END) AS '6f'
       ,COUNT(CASE WHEN ( [B] = 10 )
                        AND ( [Time] BETWEEN '2014-01-01 00:00:00' AND '2014-02-01 00:00:00' ) THEN 1
                   ELSE NULL
              END) AS '5E'
       ,COUNT(CASE WHEN ( [B] BETWEEN 11 AND 13 )
                        AND ( [Time] BETWEEN '2014-01-01 00:00:00' AND '2014-02-01 00:00:00' ) THEN 1
                   ELSE NULL
              END) AS '4D'
       ,COUNT(CASE WHEN ( [B] = 14 )
                        AND ( [Time] BETWEEN '2014-01-01 00:00:00' AND '2014-02-01 00:00:00' ) THEN 1
                   ELSE NULL
              END) AS '1A'
       ,COUNT(CASE WHEN ( [A Step] BETWEEN 1 AND 25 )
                        AND ( [Time] BETWEEN '2014-01-01 00:00:00' AND '2014-02-01 00:00:00' ) THEN 1
                   ELSE NULL
              END) AS '2B'
       ,COUNT(CASE WHEN [B Step] = 0
                        AND [ A Step] = 0
                        AND ( [Time] BETWEEN '2014-01-01 00:00:00' AND '2014-02-01 00:00:00' ) THEN 1
                   ELSE NULL
              END) AS '3C'
    FROM dbo.[1_Data]

• 您不需要将 '2014-01-01' 转换为 DATETIME SQL Server 会自动执行此操作
• 您可以在CASE 语句和CASE 语句的COUNT 结果中放置逻辑，计数时请记住NULL 您的else 结果，否则它将计算所有内容。