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Create random number
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À
03/06/2012 10:26:10
Mike Yearwood
Toronto, Ontario, Canada
Information générale
Forum:
Microsoft SQL Server
Catégorie:
Autre
Versions des environnements
SQL Server:
SQL Server 2005
Divers
Thread ID:
01545107
Message ID:
01545184
Vues:
54
>>Hi,
>>
>>In VFP I am creating a random number (that has to fit into N(8,0) size field) as following:
>>
>>
>>rand(-1)
>>nNumber = int( rand() * 100000000 )
>>
>>
>>I found online article that has the following code for creating a random number:
>>
>>
>>SELECT CAST(RAND() * 1000000 AS INT) AS [RandomNumber]
>>
>>
>>Is this equivalent to the VFP code?
>
>Unless you are running a lottery or something, I see no reason why you would want a random number. Generating of any random number implies the new number might already exist in the table.
>
>I also think it really unfortunate that you started by asking for a random number, and no one stops you to ask what do you intend to do with it. That resulted in a lot of noise that served no purpose.
>
>You seem to be requiring a number that is unique to each record. If not, please explain what you are doing.

Yes, I do need a unique number to be set into a field of a table (not PK field). In VFP I have used the random number approach for this case and have not had any problems. Why could not the same work in SQL?
"The creative process is nothing but a series of crises." Isaac Bashevis Singer
"My experience is that as soon as people are old enough to know better, they don't know anything at all." Oscar Wilde
"If a nation values anything more than freedom, it will lose its freedom; and the irony of it is that if it is comfort or money that it values more, it will lose that too." W.Somerset Maugham
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