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    <p>I think your problem is because you are not specifying the size on your varchar (which is defaulting to 1). This is resulting in the input and the output being truncated to a single character. (You were also missing an <code>@</code> on your variable inside the function.)</p> <p>So <code>PRINT dbo.SizeExample('16-18')</code> will print <code>'B'</code> (which is not only truncated, it's also not the answer you probably want, which is <code>'1'</code>)</p> <p>Try instead:</p> <pre><code>CREATE FUNCTION MaraSizeExample ( @ms varchar(5) ) RETURNS varchar(3) AS BEGIN RETURN CASE @ms WHEN '16-18' THEN '1' WHEN '18-20' THEN '2' WHEN '20-22' THEN '3' WHEN '22+' THEN '4' WHEN '24+' THEN '5' WHEN '14-16' THEN '7' ELSE 'BAD' END END </code></pre> <ol> <li><p><code>CASE</code> is just a searched (or lookup) expression - you cannot <code>RETURN</code> from inside it - it's kind of like like <code>IIF()</code> in VB or <code>IF()</code> in Excel. The earlier answer basically explained that.</p></li> <li><p><code>VARCHAR</code> means <code>VARCHAR(1)</code>, so you would get truncation - i.e. you'd never see <code>'BAD'</code> coming out, only <code>'B'</code>. I'm not sure why you don't get a truncation warning when it happens like you get on some <code>SQL</code> <code>INSERT</code>, but there you go.</p></li> <li><p><code>@ms</code> is your variable's name. I'm not sure why ms would be accepted unless there was some other database object by that name (a table?) - and even then it wouldn't be. All variables and parameters in <code>T-SQL</code> are prefixed with <code>@</code> like this.</p></li> </ol>
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    1. POSql Server Case Statement gives me errors in user-defined function
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    1. USCade Roux
    1. USCade Roux
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    1. COSo I can't reference my variable just by its name? I have to use @ms everywhere?
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      1. USTony Peterson
    2. COTony, I think what he's trying to say is that without specifying the size of the VARCHAR it's returning, if you pass in an invalid input (which would result in the output being 'BAD'), you'd get back just 'B'. So you should set the length of the VARCHAR to whatever maximum size you'd expect.
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      1. USKevin Fairchild
    3. COI think I did three things wrong. I'm new to Stored Procs and Scalar Functions in SQL Server 1. Shouldn't have included the return in the then clause of the CASE. 2. Set the size of varchar 3. Refer to variables by @var?
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