CTE_Users nos da una lista de todos los usuarios con fechas de Inicio y Finalización para cada usuario.
Se une con el Calendar tabla para generar una fila para cada fecha para cada usuario.
Finalmente se deja unido con la tabla principal Test para devolver Total para cada fecha. ISNULL asegura que aquellas fechas que no tienen datos devuelvan 0.
WITH
CTE_Users
AS
(
SELECT
Userid
,MIN(startdate) AS StartDate
,MAX(enddate) AS EndDate
FROM TEST
GROUP BY Userid
)
SELECT
ROW_NUMBER() OVER (ORDER BY CTE_Users.Userid, Calendar.dt) AS ID
,CTE_Users.Userid
,T.Id1
,Calendar.dt
,ISNULL(T.Total, 0) AS Total
FROM
CTE_Users
INNER JOIN Calendar ON
Calendar.dt >= CTE_Users.StartDate
AND Calendar.dt <= CTE_Users.EndDate
LEFT JOIN TEST AS T ON
T.Userid = CTE_Users.Userid
AND T.date1 = Calendar.dt
ORDER BY CTE_Users.Userid, Calendar.dt;
Resultado
| ID | Userid | Id1 | dt | Total |
|----|--------|--------|------------|-------|
| 1 | abc | 1 | 2015-01-13 | 200 |
| 2 | abc | 2 | 2015-01-14 | 200 |
| 3 | abc | 3 | 2015-01-15 | 200 |
| 4 | abc | (null) | 2015-01-16 | 0 |
| 5 | abc | (null) | 2015-01-17 | 0 |
| 6 | abc | (null) | 2015-01-18 | 0 |
| 7 | abc | 4 | 2015-01-19 | 200 |
| 8 | abc | 5 | 2015-01-20 | 200 |
| 9 | abc | (null) | 2015-01-21 | 0 |
| 10 | abc | (null) | 2015-01-22 | 0 |
| 11 | abc | 6 | 2015-01-23 | 200 |
| 12 | abc | 7 | 2015-01-24 | 200 |
| 13 | def | (null) | 2015-02-10 | 0 |
| 14 | def | (null) | 2015-02-11 | 0 |
| 15 | def | 8 | 2015-02-12 | 200 |
| 16 | def | 9 | 2015-02-13 | 200 |
| 17 | def | (null) | 2015-02-14 | 0 |
| 18 | def | 10 | 2015-02-15 | 200 |
| 19 | def | 11 | 2015-02-16 | 200 |
| 20 | def | 12 | 2015-02-17 | 200 |
| 21 | def | 13 | 2015-02-18 | 200 |
| 22 | def | (null) | 2015-02-19 | 0 |
| 23 | def | (null) | 2015-02-20 | 0 |
ID es un número de fila generado sobre la marcha. Id1 son los ID originales de la Test mesa.
Generaría Calendar tabla como esta:
CREATE TABLE [Calendar](
[dt] [date] NOT NULL
CONSTRAINT [PK_Calendar] PRIMARY KEY CLUSTERED
(
[dt] ASC
));
-- 10K dates from 2000-01-01 till 2027-05-18
INSERT INTO Calendar (dt)
SELECT TOP (10000)
DATEADD(day, ROW_NUMBER() OVER (ORDER BY s1.[object_id])-1, '2000-01-01') AS dt
FROM sys.all_objects AS s1 CROSS JOIN sys.all_objects AS s2
OPTION (MAXDOP 1);
