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Select 10 contacts in a company randomly


Select 10 contacts in a company randomly

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sharonrao123
sharonrao123
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hi All,

We have two table company and people and people has coid as a foreign key. I need to select 10 contacts or less for each company randomly.

Below are the structures:

Company - CoID, Company, address, street, city, state, postcode, country, phone, fax, addedby, addedon, editedby, editedon

People- PersonID, CoID, Firstname, lastname, title, persontype, email, addedon, addedby, editedon, editedby

Thanks for your help, please get me started
Jeff Moden
Jeff Moden
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Points: 51575 Visits: 40305
This should get you started...

WITH 
cteRandomlyNumber AS
(
SELECT PersonID,
CoID,
RowNum = ROW_NUMBER() OVER (PARTITION BY CoID ORDER BY NEWID())
FROM dbo.People
)
SELECT PersonID, CoID
FROM cteRandomlyNumber
WHERE RowNum <= 10



Takes about 12 seconds on a million employees across 676 different companies.

--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.
Although they tell us that they want it real bad, our primary goal is to ensure that we dont actually give it to them that way.
Although change is inevitable, change for the better is not.
Just because you can do something in PowerShell, doesnt mean you should. Wink

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sharonrao123
sharonrao123
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hi,

You are a star it worked like a charm, thanks for your time.

-Shilpa.
Jeff Moden
Jeff Moden
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Thanks for the feedback, Shilpa.

--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.
Although they tell us that they want it real bad, our primary goal is to ensure that we dont actually give it to them that way.
Although change is inevitable, change for the better is not.
Just because you can do something in PowerShell, doesnt mean you should. Wink

Helpful Links:
How to post code problems
How to post performance problems
Forum FAQs
David Walker-278941
David Walker-278941
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I thought that GUIDs didn't have an order. I am never able to ORDER by a GUID, so why are you able to ORDER BY NEWID() here?
Jeff Moden
Jeff Moden
SSC Guru
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Group: General Forum Members
Points: 51575 Visits: 40305
To produce a random order. It's an old trick.

--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.
Although they tell us that they want it real bad, our primary goal is to ensure that we dont actually give it to them that way.
Although change is inevitable, change for the better is not.
Just because you can do something in PowerShell, doesnt mean you should. Wink

Helpful Links:
How to post code problems
How to post performance problems
Forum FAQs
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