Using While Loop with UNION clause

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Using While Loop with UNION clause

ebuss_2004

Old Hand

Points: 303
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September 20, 2008 at 11:00 pm

#193370

Hi, Anyone can help?
How can I show the output of this loop in one recordset?
Another words, I want UNION the output in a single recordset. Please help. Thanks
DECLARE @cn AS int
set @cn = 0
while @cn < 10
begin
select rank ()over (order by budperc desc) as rank, * from table1
where id =@cn+1
set @cn = @cn+1
end

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Ron McCullough SSC Guru Points: 63877 More actions · Answer 1

This returns a single recordset ... and might be what you are looking for

took this example from BOL

USE AdventureWorks;

GO

SELECT

RANK() OVER(ORDER BY SalesYTD DESC) AS 'Rank'

,s.SalesYTD,s.salespersonid

FROM Sales.SalesPerson s

WHERE s.salespersonid < 280

Notice there is no looping - hope this helps

If everything seems to be going well, you have obviously overlooked something.

Ron

Please help us, help you -before posting a question please read[/url]
Before posting a performance problem please read[/url]

Jeff Moden SSC Guru Points: 1003863 More actions · Answer 2

With the info given, there's no need for a loop.

SELECT RANK() OVER(PARTITION BY ID ORDER BY BudPerc DESC) AS Rank, *

FROM Table1

WHERE ID BETWEEN 1 AND 10

The PARTITION BY will do the trick so far as restarting the RANK for each ID.

--Jeff Moden

RBAR is pronounced "ree-bar" and is a "Modenism" for Row-By-Agonizing-Row.
First step towards the paradigm shift of writing Set Based code:
________Stop thinking about what you want to do to a ROW... think, instead, of what you want to do to a COLUMN.

Change is inevitable... Change for the better is not.

Helpful Links:
How to post code problems
How to Post Performance Problems
Create a Tally Function (fnTally)

ebuss_2004 Old Hand Points: 303 More actions · Answer 3

It works now. As you said the trick was in Partition BY clause to restart the ranking.. Awesome!! Thanx a lot..

Jeff Moden SSC Guru Points: 1003863 More actions · Answer 4

You bet. Thanks a bunch for the feedback. 🙂

--Jeff Moden

RBAR is pronounced "ree-bar" and is a "Modenism" for Row-By-Agonizing-Row.
First step towards the paradigm shift of writing Set Based code:
________Stop thinking about what you want to do to a ROW... think, instead, of what you want to do to a COLUMN.

Change is inevitable... Change for the better is not.

Helpful Links:
How to post code problems
How to Post Performance Problems
Create a Tally Function (fnTally)