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How to obtain Sum of count Expand / Collapse
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Posted Wednesday, January 16, 2013 7:08 AM
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The View obtains the first three columns , i need to add one more column(totalCount) to the view that obtains the totalCount

CId CCId CCount totalCount
1 a 3 6
1 a 3 6
1 b 3 6
1 c 3 6
2 b 2 6
2 b 2 6
2 a 2 6
2 a 2 6
3 v 1 6

How to get the totalCount as 6 ?
(Business rule for Cid=1 Ccount=3
Cid=2 Ccount=2
Cid=3 Ccount=1

So the totalCount =3+2+1 =6)
Post #1407824
Posted Wednesday, January 16, 2013 8:54 AM


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How are you getting the counts? are you basing this on the CCID column for a CID?

It's better if you can give DDL like this:

CREATE TABLE mytable
( CId int
, CCId varchar(10)
, CCount int
, totalCount int
)
;
GO
INSERT MyTable
VALUES (1, 'a',3, 6)
, (1, 'a', 3, 6)
, (1, 'b', 3, 6)
, (1, 'c', 3, 6)
, (2, 'b', 2, 6)
, (2, 'b', 2, 6)
, (2, 'a', 2, 6)
, (2, 'a', 2, 6)
, (3, 'v', 1, 6)
;
go

Also, please explain the logic, don't just give some results and expect someone to interpret them to match your business rule. It saves time.







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Post #1407894
Posted Wednesday, January 16, 2013 8:55 AM


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This kind of works, but I'm wondering if you've calculated something in this view already.

SELECT cid, COUNT(DISTINCT ccid)
FROM dbo.MyTable
GROUP BY cid








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Post #1407896
Posted Wednesday, January 16, 2013 9:22 AM


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;WITH SampleData AS (
SELECT CId = 1, CCId = 'a', CCount = 3, totalCount = 6 UNION ALL
SELECT 1, 'a', 3, 6 UNION ALL
SELECT 1, 'b', 3, 6 UNION ALL
SELECT 1, 'c', 3, 6 UNION ALL
SELECT 2, 'b', 2, 6 UNION ALL
SELECT 2, 'b', 2, 6 UNION ALL
SELECT 2, 'a', 2, 6 UNION ALL
SELECT 2, 'a', 2, 6 UNION ALL
SELECT 3, 'v', 1, 6
)

SELECT
CId,
CCId,
CCount,
totalCount = SUM([First]) OVER (PARTITION BY (SELECT NULL))
FROM (
SELECT *,
[First] = CASE WHEN 1 = ROW_NUMBER() OVER(PARTITION BY CId ORDER BY CCId) THEN CCount END
FROM SampleData
) d



“Write the query the simplest way. If through testing it becomes clear that the performance is inadequate, consider alternative query forms.” - Gail Shaw

For fast, accurate and documented assistance in answering your questions, please read this article.
Understanding and using APPLY, (I) and (II) Paul White
Hidden RBAR: Triangular Joins / The "Numbers" or "Tally" Table: What it is and how it replaces a loop Jeff Moden
Exploring Recursive CTEs by Example Dwain Camps
Post #1407921
Posted Wednesday, January 16, 2013 11:08 AM
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As per my requirement , it would be something :

SELECT
CId,
CCId,
CCount,
(select totalCount = SUM([First]) OVER (PARTITION BY (SELECT NULL))
FROM (
SELECT *,
[First] = CASE WHEN 1 = ROW_NUMBER() OVER(PARTITION BY CId ORDER BY CCId) THEN CCount END
FROM SampleData
) d)

from SampleData

but it's giving error.
Post #1408008
Posted Wednesday, January 16, 2013 12:04 PM


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Well the query that Chris posted returns the exact output you specified. If you need something different you have to explain it. We can't see your screen, we are not familiar with your project and we don't know the business rules.

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Post #1408027
Posted Wednesday, January 16, 2013 5:42 PM


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ChrisM@Work (1/16/2013)
;WITH SampleData AS (
SELECT CId = 1, CCId = 'a', CCount = 3, totalCount = 6 UNION ALL
SELECT 1, 'a', 3, 6 UNION ALL
SELECT 1, 'b', 3, 6 UNION ALL
SELECT 1, 'c', 3, 6 UNION ALL
SELECT 2, 'b', 2, 6 UNION ALL
SELECT 2, 'b', 2, 6 UNION ALL
SELECT 2, 'a', 2, 6 UNION ALL
SELECT 2, 'a', 2, 6 UNION ALL
SELECT 3, 'v', 1, 6
)

SELECT
CId,
CCId,
CCount,
totalCount = SUM([First]) OVER (PARTITION BY (SELECT NULL))
FROM (
SELECT *,
[First] = CASE WHEN 1 = ROW_NUMBER() OVER(PARTITION BY CId ORDER BY CCId) THEN CCount END
FROM SampleData
) d



+1

Chris - You are a true code-talker! Are you sure you're not part Navaho?



My mantra: No loops! No CURSORs! No RBAR! Hoo-uh!

My thought question: Have you ever been told that your query runs too fast?

My advice:
INDEXing a poor-performing query is like putting sugar on cat food. Yeah, it probably tastes better but are you sure you want to eat it?
The path of least resistance can be a slippery slope. Take care that fixing your fixes of fixes doesn't snowball and end up costing you more than fixing the root cause would have in the first place.


Need to UNPIVOT? Why not CROSS APPLY VALUES instead?
Since random numbers are too important to be left to chance, let's generate some!
Learn to understand recursive CTEs by example.
Splitting strings based on patterns can be fast!
Post #1408110
Posted Wednesday, January 16, 2013 11:30 PM
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The ccount is not obtain directly from table as done here.Am rather using the View written as below

With compTable(cid,ccid,ccount)
as
AS
(
select parentid,childrenId,COUNT(cmpcd) FROM
group by parentid,childrenId,cmpcd
)

select decsr,
pnumber,
(SELECT count(ccount) FROM compTable where parentid=ch.cn_id) as [Count] ,--[this is ccount]
-- here i need the total count
from table ch inner join table b
on ch.id=b.id

Post #1408158
Posted Thursday, January 17, 2013 1:09 AM


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sabeer.mvit (1/16/2013)
The ccount is not obtain directly from table as done here.Am rather using the View written as below

With compTable(cid,ccid,ccount)
as
AS
(
select parentid,childrenId,COUNT(cmpcd) FROM
group by parentid,childrenId,cmpcd
)

select decsr,
pnumber,
(SELECT count(ccount) FROM compTable where parentid=ch.cn_id) as [Count] ,--[this is ccount]
-- here i need the total count
from table ch inner join table b
on ch.id=b.id



Can you post the whole query referencing the view, and also the view definition, please? Some sample data would help too - exactly what will probably depend upon the view definition.


“Write the query the simplest way. If through testing it becomes clear that the performance is inadequate, consider alternative query forms.” - Gail Shaw

For fast, accurate and documented assistance in answering your questions, please read this article.
Understanding and using APPLY, (I) and (II) Paul White
Hidden RBAR: Triangular Joins / The "Numbers" or "Tally" Table: What it is and how it replaces a loop Jeff Moden
Exploring Recursive CTEs by Example Dwain Camps
Post #1408198
Posted Thursday, January 17, 2013 1:11 AM


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dwain.c (1/16/2013)
... Are you sure you're not part Navaho?


No but one of my programming buddies went AWOL for six months last year - and resurfaced in Michigan married to an Apache!


“Write the query the simplest way. If through testing it becomes clear that the performance is inadequate, consider alternative query forms.” - Gail Shaw

For fast, accurate and documented assistance in answering your questions, please read this article.
Understanding and using APPLY, (I) and (II) Paul White
Hidden RBAR: Triangular Joins / The "Numbers" or "Tally" Table: What it is and how it replaces a loop Jeff Moden
Exploring Recursive CTEs by Example Dwain Camps
Post #1408199
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