SQL 查询计算以 30 分钟为间隔列出的消耗读数，需要按日期时间戳和仪表序列号 DESC 排序

Question

嗨 Stack Overflow 成员 :)

我需要获取前向主动阅读的每一行的消耗量。将差异放在消费栏中。差异是每 30 分钟的间隔。例如; 17897352 - 17897335 = 17 作为 [consumption/30min] 但我不想按日期分组，但需要按日期时间戳 DESC 排序。

样本Table内容：

DeviceReadingID MeterRefID  DateTimeStamp   ForwardActiveReading  
284729948   ELON102582  2020-07-01 00:00:00.000 17897352
284756341   ELON102582  2020-06-30 23:30:00.000 17897335
284746613   ELON102582  2020-06-30 23:00:00.000 17897319
284710326   ELON102582  2020-06-30 22:30:00.000 17897303
284743959   ELON102582  2020-06-30 22:00:00.000 17897286
284762422   ELON102582  2020-06-30 21:30:00.000 17897270
284739309   ELON102582  2020-06-30 21:00:00.000 17897253
284758349   ELON102582  2020-06-30 20:30:00.000 17897237
284675646   ELON102582  2020-06-30 20:00:00.000 17897220
284686333   ELON102582  2020-06-30 19:30:00.000 17897204
284559642   ELON102582  2020-06-30 19:00:00.000 17897187
284560601   ELON102582  2020-06-30 18:30:00.000 17897171
284659743   ELON102582  2020-06-30 18:00:00.000 17897154
284657476   ELON102582  2020-06-30 17:30:00.000 17897111
284655871   ELON102582  2020-06-30 17:00:00.000 17897055
284636705   ELON102582  2020-06-30 16:30:00.000 17896998
284653158   ELON102582  2020-06-30 16:00:00.000 17896941
284624220   ELON102582  2020-06-30 15:30:00.000 17896885
284619064   ELON102582  2020-06-30 15:00:00.000 17896828

谢谢，我非常感谢您对上述内容的帮助。我似乎不知道该怎么做

我试图使用下面的示例，但它没有帮助

        WITH    SampleData  AS
    (
            SELECT  [TimeStamp], [MeterID], [Count]
            FROM    (   VALUES
                        ('2013-09-28 00:00:10', 'BA123', 1453.034),
                        ('2013-09-28 00:01:12', 'BA123', 1454.770),
                        ('2013-09-28 00:00:14', 'BB777', 2351.000),
                        ('2013-09-28 23:59:50', 'BA123', 1470.120),
                        ('2013-09-29 00:00:05', 'BA123', 1470.445)
                    )   AS SampleData([TimeStamp], [MeterID], [Count])
    )
    
    
    
    SELECT      MeterId, CAST([TimeStamp] AS datetime) AS [DateConsumption],
                MAX([Count]) - MIN([Count]) AS [CountConsumption]
    FROM        SampleData
    GROUP BY    MeterID, CAST([TimeStamp] AS datetime)
    --WITH ROLLUP

我想做一个 Select 查询，它会给我以下结果：

Answer 1

此查询正在向示例 table 输出添加消耗列

select *, ForwardActiveReading - lead(ForwardActiveReading, 1, 0) over(order by DateTimeStamp desc)
from yourtable
order by DateTimeStamp desc

SQL 查询计算以 30 分钟为间隔列出的消耗读数，需要按日期时间戳和仪表序列号 DESC 排序

SQL Query to Calculate the Consumption Readings listed in 30min intervals, needs to be order by Date Time stamp and meter Serial Number DESC

sql

sql-server

select

datetime

difference