ROWS BETWEEN UNBOUNDED PRECEDING AND CURRENT

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ROWS BETWEEN UNBOUNDED PRECEDING AND CURRENT

Author

Topic

sunriser
Starting Member

14 Posts

Posted - 2012-12-19 : 06:05:29

Hi All,

I have a query in oracle , we have used ROWS BETWEEN UNBOUNDED PRECEDING AND CURRENT ROW in the query . now the problem is we cannot use the same function in sqlserver 2008 so please help us in overcoming this issue.

SELECT
cast(ROUND(READING_VALUE /
(
SELECT
MAX(READING_VALUE)
FROM
MACHINE_READING
WHERE
MACHINE=INST.MACHINE
AND LEFT(READ_DATE,4)='2012') AS "%PEAK",
cast(ROUND(SUM(COUNT(READING_VALUE)) OVER (ORDER BY READING_VALUE DESC ROWS BETWEEN UNBOUNDED PRECEDING AND CURRENT ROW)/
(
SELECT COUNT(*) AS CNT FROM MACHINE_READING WHERE MACHINE=INST.MACHINE AND LEFT(READ_DATE,4)='2012')
,4)*100 as decimal(20,4)) AS "%DUR"
FROM
MACHINE_READING INST,
MACHINE_AREA_ NET,
DATE_DIMENSION DM
WHERE
INST.AREA_ID=NET.ID AND
INST.READ_DATE=DM.DATE_ID
AND NET.MACHINE='${MtrNumber}'
AND DM.YEAR='${ReadYear}' AND
GROUP BY
READING_VALUE ,INST.MACHINE
ORDER BY READING_VALUE

sunriser

bandi
Master Smack Fu Yak Hacker

2242 Posts

Posted - 2012-12-19 : 06:28:16

See this once..

create table #t ( ord int primary key, total int, running_total int)

insert #t(ord,total) values (2,20)
-- notice the malicious re-ordering
insert #t(ord,total) values (1,10)
insert #t(ord,total) values (3,10)
insert #t(ord,total) values (4,1)

declare @total int
set @total = 0
update #t set running_total = @total, @total = @total + total

select * from #t
order by ord

--
Chandu

visakh16
Very Important crosS Applying yaK Herder

52326 Posts

Posted - 2012-12-19 : 07:51:30

SUM(COUNT(READING_VALUE)) OVER (ORDER BY READING_VALUE DESC ROWS BETWEEN UNBOUNDED PRECEDING AND CURRENT ROW)

can be replaced with a subquery as


yourquery
..
CROSS APPLY (SELECT SUM(Cnt) AS Total
             FROM(SELECT COUNT(READING_VALUE) AS Cnt FROM ..... WHERE READING_VALUE <= maintable.READING_VALUE )t
            )r

then you can use Total in select

------------------------------------------------------------------------------------------------------
SQL Server MVP
http://visakhm.blogspot.com/

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