In my stored procedure, I have a tempory table #Branches. I am inserting values into #Branches and table structure is as follows:
declare #Branches table( BranchId int, BranchName varchar(60))
BranchID BranchName IsActive
--------------------------------
16 New Delhi 1
17 Panjab 0
In my database have a table called lobby and its data as follows,
QueueID FkBranch IsActive Status AddedLocalTime FkAssistTypeID
553279 16 1 5 7/12/2019 2
553278 16 1 5 7/12/2019 1
553277 16 1 5 7/12/2019 1
553276 16 1 5 7/12/2019 1
553275 16 1 5 7/12/2019 2
553274 16 1 5 7/9/2019 2
I need to get count of the FkAssistTypeID based on its value, I retied this Script
declare #BranchDetail table (Id int, Name varchar(60), TotalInteraction float, AssistCount float)
insert into #BranchDetail
select b.BranchId as Id, b.BranchName as Name,
count(lo.LobbyId) TotalInteraction,
count(case WHEN lo.FkAssistTypeID = 1 then 1 end) as AssistCount
from
#Branches b
left outer join
(select br.BranchId, l.LobbyId, l.FkAssistTypeID
from lobby l
left outer join #Branches br on l.FkBranchId = br.BranchId
where l.AddedLocalTime >= #startDate
and l.AddedLocalTime <= CONVERT(VARCHAR, #endDate, 101) + ' 23:59:59'
and l.IsActive = 1
group by br.BranchId, l.LobbyId) lo on lo.BranchId = b.BranchId
group by
b.BranchId, b.BranchName
order by
b.BranchName
select #AvgInteractions= COALESCE( Convert(decimal(18,2), AVG(TotalInteraction)),0) from #BranchDetail
update #BranchDetail
SET AverageInteractions =#AvgInteractions from #BranchDetail
select * from #BranchDetail
I'm getting this error
Msg 8120, Level 16, State 1, Procedure spGetActComDetails, Line 228 [Batch Start Line 7]
Column 'lobby.FkAssistTypeId' is invalid in the select list because it is not contained in either an aggregate function or the GROUP BY clause.
But If I remove FkAssistTypeID everywhere its used in the above query, query works fine and retreive this output.
But I need this
How to solve this?
Try:
insert into #BranchDetail
select b.BranchId as Id,b.BranchName as Name,count(lo.LobbyId) TotalInteraction,
SUM(case WHEN lo.FkAssistTypeID = 1 THEN 1 ELSE 0 END) as AssistCount
from #Branches b
left outer join
(
select br.BranchId,l.LobbyId,l.FkAssistTypeID
from lobby l
left outer join #Branches br on l.FkBranchId=br.BranchId
where l.AddedLocalTime >=#startDate and ( l.AddedLocalTime ) <= CONVERT(VARCHAR, #endDate, 101)+ ' 23:59:59'and l.IsActive=1
group by br.BranchId,l.LobbyId,l.FkAssistTypeID) lo on lo.BranchId=b.BranchId
group by b.BranchId,b.BranchName
order by b.BranchName
You need to use SUM instead COUNT, because COUNT:
COUNT(*) returns the number of items in a group. This includes NULL
values and duplicates.
Related
I've this sp, which return a list of data, for each "month" (i.e. each row is a month). Somethings like that:
SELECT
*,
(CAST(t1.NumActivities AS DECIMAL) / t1.NumVisits) * 100 AS PercAccepted,
(CAST(t1.Accepted AS DECIMAL) / t1.Estimated) * 100 AS PercValue
FROM
(SELECT
MONTH(DateVisit) AS Month,
COUNT(*) AS NumVisits,
SUM(CASE WHEN DateActivity is not null THEN 1 ELSE 0 END) AS NumActivities,
SUM(Estimate) AS Estimated,
SUM(CASE WHEN DateActivity is not null THEN Estimate ELSE 0 END) AS Accepted
FROM [dbo].[Activities]
WHERE
DateVisit IS NOT NULL
AND (#year IS NULL OR YEAR(DateVisit) = #year)
AND (#clinicID IS NULL OR ClinicID = #clinicID)
GROUP BY MONTH(DateVisit)) t1
This is a result:
Month NumVisits NumActivities Estimated Accepted PercAccepted PercValue
1 5 1 13770.00 2520.00 20.00000000000 18.30065359477124
2 2 2 7900.00 7900.00 100.00000000000 100.00000000000000
3 1 0 2730.00 0.00 0.00000000000 0.00000000000000
8 1 1 3000.00 3000.00 100.00000000000 100.00000000000000
But as you can see, I could "miss" some Month (for example, here April "4" is missed).
Is it possible to insert, for the missing month/row, an empty (0) record? Such as:
Month NumVisits NumActivities Estimated Accepted PercAccepted PercValue
1 5 1 13770.00 2520.00 20.00000000000 18.30065359477124
2 2 2 7900.00 7900.00 100.00000000000 100.00000000000000
3 1 0 2730.00 0.00 0.00000000000 0.00000000000000
4 0 0 0 0 0 0
...
Here is a example with sample data:
CREATE TABLE #Report
(
Id INT,
Name nvarchar(max),
Percentage float
)
INSERT INTO #Report VALUES (1,'ONE',2.01)
INSERT INTO #Report VALUES (2,'TWO',3.01)
INSERT INTO #Report VALUES (5,'Five',5.01)
;WITH months(Month) AS
(
SELECT 1
UNION ALL
SELECT Month+1
FROM months
WHERE Month < 12
)
SELECT *
INTO #AllMonthsNumber
from months;
Your select query:
The left join will gives you the NULL for other months so just use ISNULL('ColumnName','String_to_replace')
\/\/\/\/
SELECT Month, ISNULL(Name,0), ISNULL(Percentage,0)
FROM AllMonthsNumber A
LEFT JOIN #Report B
ON A.Month = B.Id
EDIT:
Yes you can do it without creating AllMonthNumber Table:
You can use master..spt_values (found here) system table which contains the numbers so just with some where condition.
SELECT Number as Month, ISNULL(B.Name,0), ISNULL(Percentage,0)
FROM master..spt_values A
LEFT JOIN #Report B ON A.Number = B.Id
WHERE Type = 'P' AND number BETWEEN 1 AND 12
I'm trying to generate the numbers in the "x" column considering the values in field "eq", in a way that it should assign a number for every record until it meets the value "1", and the next row should reset and start counting again. I've tried with row_number, but the problem is that I only have ones and zeros in the column I need to evaluate, and the cases I've seen using row_number were using growing values in a column. Also tried with rank, but I haven't managed to make it work.
nInd Fecha Tipo #Inicio #contador_I #Final #contador_F eq x
1 18/03/2002 I 18/03/2002 1 null null 0 1
2 20/07/2002 F 18/03/2002 1 20/07/2002 1 1 2
3 19/08/2002 I 19/08/2002 2 20/07/2002 1 0 1
4 21/12/2002 F 19/08/2002 2 21/12/2002 2 1 2
5 17/03/2003 I 17/03/2003 3 21/12/2002 2 0 1
6 01/04/2003 I 17/03/2003 4 21/12/2002 2 0 2
7 07/04/2003 I 17/03/2003 5 21/12/2002 2 0 3
8 02/06/2003 F 17/03/2003 5 02/06/2003 3 0 4
9 31/07/2003 F 17/03/2003 5 31/07/2003 4 0 5
10 31/08/2003 F 17/03/2003 5 31/08/2003 5 1 6
11 01/09/2005 I 01/09/2005 6 31/08/2003 5 0 1
12 05/09/2005 I 01/09/2005 7 31/08/2003 5 0 2
13 31/12/2005 F 01/09/2005 7 31/12/2005 6 0 3
14 14/01/2006 F 01/09/2005 7 14/01/2006 7 1 4
There is another solution available:
select
nind, eq, row_number() over (partition by s order by s)
from (
select
nind, eq, coalesce((
select sum(eq) +1 from mytable pre where pre.nInd < mytable.nInd)
,1) s --this is the sum of eq!
from mytable) g
The inner subquery creates groups sequentially for each occurrence of 1 in eq. Then we can use row_number() over partition to get our counter.
Here is an example using Sql Server
I have two answers here. One is based off of the ROW_NUMBER() and the other is based off of what appears to be your index (nInd). I wasn't sure if there would be a gap in your index so I made the ROW_NUMBER() as well.
My table format was as follows -
myIndex int identity(1,1) NOT NULL
number int NOT NULL
First one is ROW_NUMBER()...
WITH rn AS (SELECT *, ROW_NUMBER() OVER (ORDER BY myIndex) AS rn, COUNT(*) AS max
FROM counting c GROUP BY c.myIndex, c.number)
,cte (myIndex, number, level, row) AS (
SELECT r.myIndex, r.number, 1, r.rn + 1 FROM rn r WHERE r.rn = 1
UNION ALL
SELECT r1.myIndex, r1.number,
CASE WHEN r1.number = 0 AND r2.number = 1 THEN 1
ELSE c.level + 1
END,
row + 1
FROM cte c
JOIN rn r1
ON c.row = r1.rn
JOIN rn r2
ON c.row - 1 = r2.rn
)
SELECT c.myIndex, c.number, c.level FROM cte c OPTION (MAXRECURSION 0);
Now the index...
WITH cte (myIndex, number, level) AS (
SELECT c.myIndex + 1, c.number, 1 FROM counting c WHERE c.myIndex = 1
UNION ALL
SELECT c1.myIndex + 1, c1.number,
CASE WHEN c1.number = 0 AND c2.number = 1 THEN 1
ELSE c.level + 1
END
FROM cte c
JOIN counting c1
ON c.myIndex = c1.myIndex
JOIN counting c2
ON c.myIndex - 1 = c2.myIndex
)
SELECT c.myIndex - 1 AS myIndex, c.number, c.level FROM cte c OPTION (MAXRECURSION 0);
The answer that I have now is via using
Cursor
I know if there is another solution without cursor it will be better for performance aspects
here is a quick demo of my solution:
-- Create DBTest
use master
Go
Create Database DBTest
Go
use DBTest
GO
-- Create table
Create table Tabletest
(nInd int , eq int)
Go
-- insert dummy data
insert into Tabletest (nInd,eq)
values (1,0),
(2,1),
(3,0),
(4,1),
(5,0),
(6,0),
(7,0),
(8,0),
(9,1),
(8,0),
(9,1)
Create table #Tabletest (nInd int ,eq int ,x int )
go
DECLARE #nInd int , #eq int , #x int
set #x = 1
DECLARE db_cursor CURSOR FOR
SELECT nInd , eq
FROM Tabletest
order by nInd
OPEN db_cursor
FETCH NEXT FROM db_cursor INTO #nInd , #eq
WHILE ##FETCH_STATUS = 0
BEGIN
if (#eq = 0)
begin
insert into #Tabletest (nInd ,eq ,x) values (#nInd , #eq , #x)
set #x = #x +1
end
else if (#eq = 1)
begin
insert into #Tabletest (nInd ,eq ,x) values (#nInd , #eq , #x)
set #x = 1
end
FETCH NEXT FROM db_cursor INTO #nInd , #eq
END
CLOSE db_cursor
DEALLOCATE db_cursor
select * from #Tabletest
The end result set will be as following:
Hope it helps.
Looking at this a slightly different way (which might not be true, but eliminates the need for cursors of recursive CTEs), it looks like you building ordered groups within your dataset. So, start by finding those groups, then determining the ordering of each of them.
The real key is to determine the rules to find the correcting grouping. Based on your description and comments, I'm guessing the grouping is from the start (ordered by the nInd column) ending at each row with and eq value of 1, so you can do something like:
;with ends(nInd, ord) as (
--Find the ending row for each set
SELECT nInd, row_number() over(order by nInd)
FROM mytable
WHERE eq=1
), ranges(sInd, eInd) as (
--Find the previous ending row for each ending row, forming a range for the group
SELECT coalesce(s.nInd,0), e.nInd
FROM ends s
right join ends e on s.ord=e.ord-1
)
Then, using these group ranges, you can find the final ordering of each:
select t.nInd, t.Fecha, t.eq
,[x] = row_number() over(partition by sInd order by nInd)
from ranges r
join mytable t on r.sInd < t.nInd
and t.nInd <= r.eInd
order by t.nInd
I am using SQL Server 2012 and I know it is quite simple to calculate moving averages.
But what I need is to get the mode and the median for a defined window frame like so (with a window of 2 preceding to current row; month unique):
MONTH | CODE | MEDIAN | MODE
1 0 0 0
2 3 1.5 0
3 2 2 0
4 2 2 2
5 2 2 2
6 5 2 2
7 3 3 2
If several values qualify as mode, than pick the first.
I commented my code thoroughly. Read my comments on my Mode calculations and let me know it needs tweaking. Overall, it's a relatively simple query. It just has a lot of ugly subqueries and it has a lot of comments. Check it out:
DECLARE #Table TABLE ([Month] INT,[Code] INT);
INSERT INTO #Table
VALUES (1,0),
(2,3),
(3,2),
(4,2), --Try commenting this out to test my special mode thingymajig
(5,2),
(6,5),
(7,3);
WITH CTE
AS
(
SELECT ROW_NUMBER() OVER (ORDER BY [Month]) row_num,
[Month],
CAST(Code AS FLOAT) Code
FROM #Table
)
SELECT [Month],
Code,
ISNULL((
SELECT CASE
--When there is only one previous value at row_num = 2, find Mean of first two codes
WHEN A.row_num = 2 THEN (LAG(B.code,1) OVER (ORDER BY [Code]) + B.Code)/2.0
--Else find middle code value of current and previous two rows
ELSE B.Code
END
FROM CTE B
--How subquery relates to outer query
WHERE B.row_num BETWEEN A.row_num - 2 AND A.row_num
ORDER BY B.[Code]
--Order by code and offset by 1 so don't select the lowest value, but fetch the one above the lowest value
OFFSET 1 ROW FETCH NEXT 1 ROW ONLY),
0) AS Median,
--I did mode a little different
--Instead of Avg(D.Code) you could list the values because with mode,
--If there's a tie with more than one of each number, you have multiple modes
--Instead of doing that, I simply return the mean of the tied modes
--When there's one, it doesn't change anything.
--If you were to delete the month 4, then your number of Codes 2 and number of Codes 3 would be the same in the last row.
--Proper mode would be 2,3. I instead average them out to be 2.5.
ISNULL((
SELECT AVG(D.Code)
FROM (
SELECT C.Code,
COUNT(*) cnt,
DENSE_RANK() OVER (ORDER BY COUNT(*) DESC) dnse_rank
FROM CTE C
WHERE C.row_num <= A.row_num
GROUP BY C.Code
HAVING COUNT(*) > 1) D
WHERE D.dnse_rank = 1),
0) AS Mode
FROM CTE A
Results:
Month Code Median Mode
----------- ---------------------- ---------------------- ----------------------
1 0 0 0
2 3 1.5 0
3 2 2 0
4 2 2 2
5 2 2 2
6 5 2 2
7 3 3 2
If I understood your requirements correctly, your source table contains MONTH and CODE columns, and you want to calculate MEDIAN and MODE.
The query below calculates MEDIAN and MODE with moving window <= than 3 month ("2 preceding to current row") and returns the results matching your example.
-----------------------------------------------------
--Demo data
-----------------------------------------------------
CREATE TABLE #Data(
[Month] INT NOT NULL,
[Code] INT NOT NULL,
CONSTRAINT [PK_Data] PRIMARY KEY CLUSTERED
(
[Month] ASC
));
INSERT #Data
([Month],[Code])
VALUES
(1,0),
(2,3),
(3,2),
(4,2),
(5,2),
(6,5),
(7,3);
-----------------------------------------------------
--Query
-----------------------------------------------------
DECLARE #PrecedingRowsLimit INT = 2;
WITH [MPos] AS
(
SELECT [R].[Month]
, [RB].[Month] AS [SubId]
, [RB].[Code]
, ROW_NUMBER() OVER(PARTITION BY [R].[Month] ORDER BY [RB].[Code]) AS [RowNumberInPartition]
, CASE
WHEN [R].[Count] % 2 = 1 THEN ([R].[Count] + 1) / 2
ELSE NULL
END AS [MedianPosition]
, CASE
WHEN [R].[Count] % 2 = 0 THEN [R].[Count] / 2
ELSE NULL
END AS [MedianPosition1]
, CASE
WHEN [R].[Count] % 2 = 0 THEN [R].[Count] / 2 + 1
ELSE NULL
END AS [MedianPosition2]
FROM
(
SELECT [RC].[Month]
, [RC].[RowNumber]
, CASE WHEN [RC].[Count] > #PrecedingRowsLimit + 1 THEN #PrecedingRowsLimit + 1 ELSE [RC].[Count] END AS [Count]
FROM
(
SELECT [Month]
, ROW_NUMBER() OVER(ORDER BY [Month]) AS [RowNumber]
, ROW_NUMBER() OVER(ORDER BY [Month]) AS [Count]
FROM #Data
) [RC]
) [R]
INNER JOIN #Data [RB]
ON [R].[Month] >= [RB].[Month]
AND [RB].[Month] >= [R].[RowNumber] - #PrecedingRowsLimit
)
SELECT DISTINCT [M].[Month]
, [ORIG].[Code]
, COALESCE([ME].[Code],([M1].[Code] + [M2].[Code]) / 2.0) AS [Median]
, [MOD].[Mode]
FROM [MPos] [M]
LEFT JOIN [MPOS] [ME]
ON [M].[Month] = [ME].[Month]
AND [M].[MedianPosition] = [ME].[RowNumberInPartition]
LEFT JOIN [MPOS] [M1]
ON [M].[Month] = [M1].[Month]
AND [M].[MedianPosition1] = [M1].[RowNumberInPartition]
LEFT JOIN [MPOS] [M2]
ON [M].[Month] = [M2].[Month]
AND [M].[MedianPosition2] = [M2].[RowNumberInPartition]
INNER JOIN
(
SELECT [MG].[Month]
, FIRST_VALUE([MG].[Code]) OVER (PARTITION BY [MG].[Month] ORDER BY [MG].[Count] DESC , [MG].[SubId] ASC) AS [Mode]
FROM
(
SELECT [Month] , MIN([SubId]) AS [SubId], [Code] , COUNT(1) AS [Count]
FROM [MPOS]
GROUP BY [Month] , [Code]
) [MG]
) [MOD]
ON [M].[Month] = [MOD].[Month]
INNER JOIN #Data [ORIG]
ON [ORIG].[Month] = [M].[Month]
ORDER BY [M].[Month];
I have a table , the table structure is:
TransactionRecordID State TransactionMoney CreateTime
1 1 200 2014/6/19
2 0 100 2014/6/12
3 1 50 2014/3/17
4 1 400 2014/2/23
......
I want to get the result:
TransactionRecordID State TransactionMoney CreateTime TotalMoney
1 1 200 2014/6/19 650
2 0 100 2014/6/12 450
3 1 50 2014/3/17 450
4 1 400 2014/2/23 400
If current record field state=1,I would like to get sum TransactionMoney after current
record add current TransactionMoney , else get sum TransactionMoney after current record
Sorry for my english!
SQL Server 2012 makes this a lot simpler using SUM() OVER (ORDER BY ...), but in SQL Server 2008 you can use a LEFT JOIN for the same effect;
SELECT a.TransactionRecordID, a.State, a.TransactionMoney, a.CreateTime,
COALESCE(SUM(b.TransactionMoney), 0) TotalMoney
FROM transactions a
LEFT JOIN transactions b ON a.CreateTime >= b.CreateTime AND b.state = 1
GROUP BY a.TransactionRecordID, a.State, a.TransactionMoney, a.CreateTime
ORDER BY a.TransactionRecordID;
An SQLfiddle to test with.
Here is a CTE Example for Northwind. it might give you some alternate ideas.
Use Northwind
GO
declare #CustomerID varchar(6)
declare #BeginDate datetime
declare #EndDate datetime
select #CustomerID = (select top 1 CustomerID from dbo.Orders )
select #BeginDate = '01/01/1900'
select #EndDate = '12/31/2010'
;
WITH
MyCTE /* http://technet.microsoft.com/en-us/library/ms175972.aspx */
( ShipName,ShipAddress,ShipCity,ShipRegion,ShipPostalCode,ShipCountry,CustomerID,CustomerName,[Address],
City,Region,PostalCode,Country,Salesperson,OrderID,OrderDate,RequiredDate,ShippedDate,ShipperName,
ProductID,ProductName,UnitPrice,Quantity,Discount,ExtendedPrice,Freight,ROWID) AS
(
SELECT
ShipName ,ShipAddress,ShipCity,ShipRegion,ShipPostalCode,ShipCountry,CustomerID,CustomerName,[Address]
,City ,Region,PostalCode,Country,Salesperson,OrderID,OrderDate,RequiredDate,ShippedDate,ShipperName
,ProductID ,ProductName,UnitPrice,Quantity,Discount,ExtendedPrice,Freight
, ROW_NUMBER() OVER ( ORDER BY OrderDate , ProductName ASC ) as ROWID
FROM
dbo.Invoices inv /* “Invoices” is a VIEW, FYI */
where
inv.CustomerID = #CustomerID and (inv.OrderDate between #BeginDate and #EndDate)
)
SELECT
/*
ShipName,ShipAddress,ShipCity,ShipRegion,ShipPostalCode,ShipCountry,CustomerID,CustomerName,[Address],
City,Region,PostalCode,Country,Salesperson,OrderID,OrderDate,RequiredDate,ShippedDate,ShipperName,
ProductID,ProductName,UnitPrice,Quantity,Discount,ExtendedPrice,Freight,
*/
/*trim the list down a little for the final output */
CustomerID ,Salesperson,OrderID,OrderDate,ProductName,UnitPrice,Quantity,Discount,ExtendedPrice,Freight,(ExtendedPrice + Freight) as ComputedTotal
/*The below line is the “trick”. I reference the above CTE, but only get data that is less than or equal to the row that I am on (outerAlias.ROWID)*/
, (Select SUM (ExtendedPrice + Freight) from MyCTE innerAlias where innerAlias.ROWID <= outerAlias.ROWID ) as RunningTotal
, ROWID as ROWID_SHOWN_FOR_KICKS , OrderDate as OrderDateASecondTimeForConvenience
FROM
MyCTE outerAlias
/*Two Order By Options*/
ORDER BY outerAlias.OrderDate , ProductName
/* << Whatever the ORDER BY is here, should match the “ROW_NUMBER() OVER ( ORDER BY ________ ASC )” statement inside the CTE */
/*ORDER BY outerAlias.ROWID */ /* << Or, to keep is more “trim”, ORDER BY the ROWID, which will of course be the same as the “ROW_NUMBER() OVER ( ORDER BY” inside the CTE */
Can someone steer me in the right direction for solving this issue with a set-based solution versus cursor-based?
Given a table with the following rows:
Date Value
2013-11-01 12
2013-11-12 15
2013-11-21 13
2013-12-01 0
I need a query that will give me a row for each date between 2013-11-1 and 2013-12-1, as follows:
2013-11-01 12
2013-11-02 12
2013-11-03 12
...
2013-11-12 15
2013-11-13 15
2013-11-14 15
...
2013-11-21 13
2013-11-21 13
...
2013-11-30 13
2013-11-31 13
Any advice and/or direction will be appreciated.
The first thing that came to my mind was to fill in the missing dates by looking at the day of the year. You can do this by joining to the spt_values table in the master DB and adding the number to the first day of the year.
DECLARE #Table AS TABLE(ADate Date, ANumber Int);
INSERT INTO #Table
VALUES
('2013-11-01',12),
('2013-11-12',15),
('2013-11-21',13),
('2013-12-01',0);
SELECT
DateAdd(D, v.number, MinDate) Date
FROM (SELECT number FROM master.dbo.spt_values WHERE name IS NULL) v
INNER JOIN (
SELECT
Min(ADate) MinDate
,DateDiff(D, Min(ADate), Max(ADate)) DaysInSpan
,Year(Min(ADate)) StartYear
FROM #Table
) dates ON v.number BETWEEN 0 AND DaysInSpan - 1
Next I would wrap that to make a derived table, and add a subquery to get the most recent number. Your end result may look something like:
DECLARE #Table AS TABLE(ADate Date, ANumber Int);
INSERT INTO #Table
VALUES
('2013-11-01',12),
('2013-11-12',15),
('2013-11-21',13),
('2013-12-01',0);
-- Uncomment the following line to see how it behaves when the date range spans a year end
--UPDATE #Table SET ADate = DateAdd(d, 45, ADate)
SELECT
AllDates.Date
,(SELECT TOP 1 ANumber FROM #Table t WHERE t.ADate <= AllDates.Date ORDER BY ADate DESC)
FROM (
SELECT
DateAdd(D, v.number, MinDate) Date
FROM
(SELECT number FROM master.dbo.spt_values WHERE name IS NULL) v
INNER JOIN (
SELECT
Min(ADate) MinDate
,DateDiff(D, Min(ADate), Max(ADate)) DaysInSpan
,Year(Min(ADate)) StartYear
FROM #Table
) dates ON v.number BETWEEN 0 AND DaysInSpan - 1
) AllDates
Another solution, not sure how it compares to the two already posted performance wise but it's a bit more concise:
Uses a numbers table:
Linky
Query:
DECLARE #SDATE DATETIME
DECLARE #EDATE DATETIME
DECLARE #DAYS INT
SET #SDATE = '2013-11-01'
SET #EDATE = '2013-11-29'
SET #DAYS = DATEDIFF(DAY,#SDATE, #EDATE)
SELECT Num, DATEADD(DAY,N.Num,#SDATE), SUB.[Value]
FROM Numbers N
LEFT JOIN MyTable M ON DATEADD(DAY,N.Num,#SDATE) = M.[Date]
CROSS APPLY (SELECT TOP 1 [Value]
FROM MyTable M2
WHERE [Date] <= DATEADD(DAY,N.Num,#SDATE)
ORDER BY [Date] DESC) SUB
WHERE N.Num <= #DAYS
--
SQL Fiddle
It's possible, but neither pretty nor very performant at scale:
In addition to your_table, you'll need to create a second table/view dates containing every date you'd ever like to appear in the output of this query. For your example it would need to contain at least 2013-11-01 through 2013-12-01.
SELECT m.date, y.value
FROM your_table y
INNER JOIN (
SELECT md.date, MAX(my.date) AS max_date
FROM dates md
INNER JOIN your_table my ON md.date >= my.date
GROUP BY md.date
) m
ON y.date = m.max_date