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POTemp Table giving Operand Clash error
 

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    <p>I'm using a <code>CASE</code> statement to help populate a temp table, but for some reason I'm getting an Operand type clash error:</p> <pre><code>CREATE TABLE #users ( id INT IDENTITY (1, 1), userid UNIQUEIDENTIFIER, username VARCHAR(50), sysrole VARCHAR(50) ) --Insert all loadtest users into temp table INSERT INTO #users (userid, username, sysrole) SELECT id, username, sysrole = CASE WHEN id between 0 and 100 THEN '63F7971B-45FF-4E3C-86E7-9D0507AF60C0' WHEN id between 101 and 200 THEN '26478736-7937-4E52-891B-E80A8D609693' WHEN id between 201 and 300 THEN 'CEF5F44F-0961-414C-8578-22BEB0C4B9FF' WHEN id between 301 and 400 THEN '63F7971B-45FF-4E3C-86E7-9D0507AF60C0' WHEN id between 401 and 500 THEN '7FD13C9E-731B-43AE-95F0-E9AEDC65759C' END FROM user WHERE username LIKE '%Test%' </code></pre> <p>There are 500 users, so the CASE does handle all those possibilities. However the operand type clash is reading (on the line that the INSERT INTO begins on) <code>uniqueidentifier is incompatible with tinyint</code>.</p> <p>Is the <code>IDENTITY</code> column not autopopulating during the <code>INSERT</code>?</p> <p>EDIT: I just realized it would be useful to know what the <code>user</code> table looks like. It has about a dozen columns, but the ones I'm wanting to pull from it are:</p> <p><code>id</code> which is the primary key <code>username</code> which is a string (uniqueidentifier on user)</p> <p><code>sysrole</code> is getting defined by the <code>CASE</code> as you can see.</p>
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    1. COIt should be, so why are you inserting `id` instead of `userid` into the temp table?!
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    2. COTypo. It should be `FROM user`, which is a different table. The PK there is called `id`, not `userid`.
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    3. COSo if the PK is id, and presumably a tinyint, why are you inserting it into a guid column? See my answer. Apologies if I have misunderstood, sight of the `user` schema would help.
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