Ensure Table has only one row

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Ensure Table has only one row

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harsha.majety

Posted Thursday, December 08, 2011 12:30 AM

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Comments posted to this topic are about the item Ensure Table has only one row

Post #1218411

Stephen_W_Dodd

Posted Thursday, December 08, 2011 8:16 AM

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Sometimes I want to keep a "history" of the different settings, or have more than one set depending on circumstances. In these cases, I use a "current" column (bit) to determine which row I should be using. Just for info.

Post #1218651

Eric M Russell

Posted Thursday, December 08, 2011 1:39 PM

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An alternate method to insure only one row (or 2, 3, ... rows) would be to simply define a unique key and check constraint on the table's ID column.

create table tempdb..foo
(
   foo_id int not null primary key check (foo_id = 1)
);

"Wise people understand the 10,000 things without going to each one.
They know them without having to look at each one,
and they transform all without acting on each one." - The Tao Te Ching: Verse 47

Post #1218934

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