用零填充SQL查询中的日期间隔

我有下面的结构，它来自于表之间的一些连接，等等，这些连接将用于生成图表

有些ID没有所有日期的数据，这导致图表中出现一些虚线

问题是，如何为每个ID添加缺少的日期，并用零填充其数据单元格

作为脚本：

(67, '2016-09-28 00:00:00.000',1),
(178, '2016-09-28 00:00:00.000',6),
(42, '2016-09-25 00:00:00.000',1),
(66, '2016-09-25 00:00:00.000',122),
(67, '2016-09-25 00:00:00.000',2),
(10, '2016-09-24 00:00:00.000',5),
(13, '2016-09-24 00:00:00.000',4),
(66, '2016-09-24 00:00:00.000',198),
(67, '2016-09-24 00:00:00.000',15),
(178, '2016-09-24 00:00:00.000',4),
(10, '2016-09-23 00:00:00.000',1),
(13, '2016-09-23 00:00:00.000',2),
(42, '2016-09-23 00:00:00.000',4),
(66, '2016-09-23 00:00:00.000',208),
(67, '2016-09-23 00:00:00.000',15)

这里有一种方法：

with t as (
      <your query here>
     )
select i.id, rt.roundedtime, coalesce(data, 0) as data
from (select distinct id from t) i cross join
     (select distinct roundedtime rt from t) rt left join
     t
     on t.id = i.id and t.roundedtime = rt.roundedtime;

换句话说，使用交叉连接创建日期和ID的列表。然后使用左连接来引入数据

此查询在原始数据上使用select distinct来获取日期和ID的列表。获取这些列表可能有更有效的方法。

您可以在使用join的SELECT语句中选中ISNULLYourDataColumn，0

例如：

---

在上面的Select语句数据列中，如果联接后没有可用数据，则返回0

;WITH YourQueryOutput AS (
--put your select statement here
), calendar AS (
SELECT  CAST(MIN(RoundedTime) as datetime) as d,
        MAX(RoundedTime) as e
FROM YourQueryOutput
UNION ALL
SELECT  DATEADD(day,1,d),
        e
FROM calendar
WHERE d < e
)

SELECT  t.ID,
        c.d,
        COALESCE(t1.[data],0) as [data]
FROM calendar c
CROSS JOIN (
    SELECT DISTINCT ID
    FROM YourQueryOutput
    ) t
LEFT JOIN YourQueryOutput t1
    ON t.ID = t1.ID and t1.RoundedTime = c.d
ORDER BY t.ID, c.d
OPTION(MAXRECURSION 0)

---

我认为您需要使用某种日历表。@JohnHC的可能重复项我无法可视化数据结构，因此无法确定这是否是重复项，因为据我所知，有一些ID未包含在该查询中，OP需要用缺失的日期和零来显示它们。据我所知，在输出表中，没有针对某个日期的数据，所以图表呈现不正确，所以应该有一些数据，如果图表接受int，那么其他值为0，根据数据type@gofr1：没错，该查询中的ID和RoundedTime都有间隙，所以ISNULL在这里不会有太大作用，谢谢你的反馈。问题是并不是所有的日期都列出了，所以它们不会显示在您的查询中

;WITH YourQueryOutput AS (
--put your select statement here
), calendar AS (
SELECT  CAST(MIN(RoundedTime) as datetime) as d,
        MAX(RoundedTime) as e
FROM YourQueryOutput
UNION ALL
SELECT  DATEADD(day,1,d),
        e
FROM calendar
WHERE d < e
)

SELECT  t.ID,
        c.d,
        COALESCE(t1.[data],0) as [data]
FROM calendar c
CROSS JOIN (
    SELECT DISTINCT ID
    FROM YourQueryOutput
    ) t
LEFT JOIN YourQueryOutput t1
    ON t.ID = t1.ID and t1.RoundedTime = c.d
ORDER BY t.ID, c.d
OPTION(MAXRECURSION 0)

ID  d                       data
10  2016-09-23 00:00:00.000 1
10  2016-09-24 00:00:00.000 5
10  2016-09-25 00:00:00.000 0
10  2016-09-26 00:00:00.000 0
10  2016-09-27 00:00:00.000 0
10  2016-09-28 00:00:00.000 0
...
178 2016-09-23 00:00:00.000 0
178 2016-09-24 00:00:00.000 4
178 2016-09-25 00:00:00.000 0
178 2016-09-26 00:00:00.000 0
178 2016-09-27 00:00:00.000 0
178 2016-09-28 00:00:00.000 6