Re: Uniquely identifying a record in SQL without a unique key? -- MIDRANGE-L

Subject: Re: Uniquely identifying a record in SQL without a unique key?
From: "James H. H. Lampert" <jamesl@xxxxxxxxxxxxxxxxx>
Date: Fri, 28 Dec 2012 13:01:22 -0800
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Paul wrote:

Select rrn(*), * from filea.

Update filea set somefield = somevalue where rrn(filea) = somenumber.
Perhaps?
Sent from my Verizon Wireless 4G LTE Smartphone

Hmm. Actually, "Select rrn(x), x.* from filea x" would be it.

Except that "rrn()" doesn't appear to be universal across all database systems.

I think maybe Michael's suggestion of

If you're using a cursor, you can use UPDATE WHERE CURRENT OF...

appears to be what's needed. Now, I just need to learn how to use an SQL cursor . . . .

--
JHHL

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