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sql server Implicit cast or convert data type

dshi15 asked
Last Modified: 2014-03-17
Hi Expert,

I try to test @X, the following code has error, I like to know @X is Int or character data type here?

declare @X varchar(5);
set @X = 12345;
      WHEN isnumeric(@X)=1
       THEN 'Yes'
       ELSE 'No'
END AS [Test],

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Thanks in advance
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