Select data for running total graph using Transact SQL - sql

Question

I have a table with following structure:
AuthorId, FollowersNumber, PublishDate, ...
What I need is to draw graph of a running total of FollowersNumber by periods. Tricky thing is that every author is counted only once. For example for following table:
AuthorId, FollowersNumber, PublishDate
1 100 '2013-01-01'
2 200 '2013-01-01'
3 200 '2013-01-02'
2 100 '2013-01-02'
4 60 '2013-01-03'
1 30 '2013-01-03'
Result must be:
2013-01-01 - 300 (100+200)
2013-01-02 - 500 (300+200)
2013-01-03 - 560 (500+60)
Now my SQL looks like (simplified):
SELECT 0, SUM (q.FollowersNumber) AS Y FROM
(SELECT FollowersNumber FROM dbo.Aggregate p WITH (NOLOCK) WHERE p.PublishDate BETWEEN #CurrentPeriod_0_Start AND #CurrentPeriod_0_End AND p.AuthorId not IN
(SELECT AuthorId FROM dbo.Aggregate WITH (NOLOCK) WHERE PublishDate BETWEEN #PreviousPeriod_0_Start AND #PreviousPeriod_0_End)) AS q
UNION
SELECT 1, SUM (q.FollowersNumber) AS Y FROM
(SELECT FollowersNumber FROM dbo.Aggregate p WITH (NOLOCK) WHERE p.PublishDate BETWEEN #CurrentPeriod_1_Start AND #CurrentPeriod_1_End AND p.AuthorId not IN
(SELECT AuthorId FROM dbo.Aggregate WITH (NOLOCK) WHERE PublishDate BETWEEN #PreviousPeriod_1_Start AND #PreviousPeriod_1_End)) AS q
etc.
After getting that data I count running total of FollowersNumber in C# code.
This query is monstrous and runs slow.
Is there any way to make it faster?

Answer 1

http://sqlfiddle.com/#!3/ff2cf/4
Get Totals history By dates. I don't understand your parameters in query

Answer 2

Possible this be helpful for you -
DECLARE #temp TABLE
(
AuthorId INT
, FollowersNumber INT
, PublishDate DATETIME
)
INSERT INTO #temp (AuthorId, FollowersNumber, PublishDate)
VALUES
(1, 100, '20130101'),
(2, 200, '20130101'),
(3, 200, '20130102'),
(2, 100, '20130102'),
(4, 60, '20130103'),
(1, 30, '20130103')
DECLARE
#CurrentPeriod_0_Start DATETIME
, #PreviousPeriod_0_Start DATETIME
, #CurrentPeriod_0_End DATETIME
, #PreviousPeriod_0_End DATETIME
, #CurrentPeriod_1_Start DATETIME
, #PreviousPeriod_1_Start DATETIME
, #CurrentPeriod_1_End DATETIME
, #PreviousPeriod_1_End DATETIME
SELECT 0, Y = SUM(p.FollowersNumber)
FROM #temp p
WHERE p.PublishDate BETWEEN #CurrentPeriod_0_Start AND #CurrentPeriod_0_End
AND NOT EXISTS(
SELECT 1
FROM #temp p2
WHERE p2.PublishDate BETWEEN #PreviousPeriod_0_Start AND #PreviousPeriod_0_End
AND p2.AuthorId = p.AuthorId
)
UNION ALL
SELECT 1, Y = SUM(p.FollowersNumber)
FROM #temp p
WHERE p.PublishDate BETWEEN #CurrentPeriod_1_Start AND #CurrentPeriod_1_End
AND NOT EXISTS(
SELECT 1
FROM #temp p2
WHERE p2.PublishDate BETWEEN #PreviousPeriod_1_Start AND #PreviousPeriod_1_End
AND p2.AuthorId = p.AuthorId
)

Answer 3

You can use this query instead of yours.
I wrote this query using CTE in SQL Server. I tested it on your data sample and worked fine.
WITH
RANKINGTABLE AS(
SELECT [AUTHORID]
,[FOLLOWERSNUMBER]
,[PUBLISHDATE]
,DENSE_RANK() OVER(PARTITION BY AUTHORID ORDER BY PUBLISHDATE) IRANK
FROM [TESTQUERY].[DBO].[AGGREGATE]
),
DAYSUM AS(
SELECT PUBLISHDATE, SUM([FOLLOWERSNUMBER]) DATESUM
FROM RANKINGTABLE
WHERE IRANK = 1
GROUP BY PUBLISHDATE
)
SELECT DS1.PUBLISHDATE,
(SELECT SUM(DS2.DATESUM) FROM DAYSUM DS2 WHERE DS2.PUBLISHDATE <= DS1.PUBLISHDATE) PTOTAL
FROM DAYSUM DS1

Answer 4

You can try this
SELECT 1, SUM(CASE WHEN PublishDate BETWEEN #PreviousPeriod_0_Start AND #PreviousPeriod_0_End
THEN NULL ELSE CASE WHEN PublishDate BETWEEN #CurrentPeriod_0_Start AND #CurrentPeriod_0_End
THEN FollowersNumber
END
END
) AS Y
FROM dbo.Aggregate WITH(NOLOCK)
UNION ALL
SELECT 0, SUM(CASE WHEN PublishDate BETWEEN #PreviousPeriod_1_Start AND #PreviousPeriod_1_End
THEN NULL ELSE CASE WHEN PublishDate BETWEEN #CurrentPeriod_1_Start AND #CurrentPeriod_1_End
THEN FollowersNumber
END
END
) AS Y
FROM dbo.Aggregate WITH(NOLOCK)
etc.