Sql Partitioning - sql

Question

I have Sql Table data and i need to filter only the Consecutive dates blocks as i highlighted on image below..
.
and i need to add custom rates for each row on that selected blocks(this rate can display with separate column on out put).If there is more than 6 rows captured then $200 apply for each column of that block.if it is less than 6 ,it will be $125.The out put should be like this
And it should group by EmpID.
i need to get the out put using MSSQL. Can any one help me
this is what i have done through the sql view
ALTER view [dbo].[vw_Test2] AS
SELECT
tbl2.ID as Tbl2ID,
tbl1.[EmpID],
tbl1.[ExpInDateTime] as Tbl1ExpDate,
tbl2.[ExpInDateTime] as Tbl2ExpDate,
case when(CONVERT(date,tbl1.[ActInDateTime]) = CONVERT(date, DATEADD(DAY,1,tbl2.[ExpInDateTime]))) then
1
else 0
end as Token
from [dbo].[vw_Test] tbl1 join [dbo].[vw_Test] tbl2
on tbl1.ID=(tbl2.ID+1)
GO
only thing is i have to do this using SQL views

Answer 1

Please try this as a view:
ALTER VIEW [dbo].[vw_Test2] AS
WITH PreResult AS (
SELECT p.Id,p.EmpID,p.[DateTime],CASE WHEN LEAD(p.diff)OVER(ORDER BY p.Id) > 1 OR LEAD(p.EmpID)OVER(ORDER BY p.Id)<>p.EmpID THEN 1 ELSE 0 END StartNewGroup
FROM (
SELECT t.Id,t.EmpID,t.[DateTime], COALESCE(DATEDIFF(day,LAG(t.[DateTime])OVER(PARTITION BY t.EmpID ORDER BY t.Id),t.[DateTime]),1) [diff]
FROM [dbo].[vw_Test] t
) p
)
SELECT r.Id,r.EmpID,r.[DateTime]
,CASE WHEN COUNT(*)OVER(PARTITION BY r.NewGroup ORDER BY r.NewGroup) >= 6 THEN 250 ELSE 125 END [Rate]
FROM (
SELECT b.Id,b.EmpID,b.[DateTime],1+COALESCE((SELECT SUM(a.StartNewGroup) FROM PreResult a WHERE a.Id<b.Id),0) NewGroup
FROM PreResult b
) r
GO
There is also query to play with:
CREATE TABLE #Test (Id BIGINT IDENTITY(1,1),EmpID BIGINT, [DateTime] DATETIME)
INSERT INTO #Test (EmpID,[DateTime]) VALUES (5,'20150106'),(5,'20150107'),(5,'20150109'),
(5,'20150110'),(5,'20150126'),(5,'20150127'),
(5,'20150128'),(5,'20150129'),(5,'20150130'),
(5,'20150131'),(10,'20121203'),(10,'20121204'),
(10,'20121205'),(10,'20121206'),
(10,'20121207'),(10,'20121208'),(10,'20121209')
;WITH PreResult AS (
SELECT p.Id,p.EmpID,p.[DateTime],CASE WHEN LEAD(p.diff)OVER(ORDER BY p.Id) > 1 OR LEAD(p.EmpID)OVER(ORDER BY p.Id)<>p.EmpID THEN 1 ELSE 0 END StartNewGroup
FROM (
SELECT t.Id,t.EmpID,t.[DateTime], COALESCE(DATEDIFF(day,LAG(t.[DateTime])OVER(PARTITION BY t.EmpID ORDER BY t.Id),t.[DateTime]),1) [diff]
FROM #Test t
) p
)
SELECT r.Id,r.EmpID,r.[DateTime]
,CASE WHEN COUNT(*)OVER(PARTITION BY r.NewGroup ORDER BY r.NewGroup) >= 6 THEN 250 ELSE 125 END [Rate]
FROM (
SELECT b.Id,b.EmpID,b.[DateTime],1+COALESCE((SELECT SUM(a.StartNewGroup) FROM PreResult a WHERE a.Id<b.Id),0) NewGroup
FROM PreResult b
) r
DROP TABLE #Test
Please let me know if you have any questions.