<p>I have a dataset with the following query: select name from flights where flight_type = ?</p>
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<p>When I preview this query and set the value to 'C', I get nothing. When I modify the query and hardcode in the value, like so:</p>
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<p>select name from flights where flight_type = 'C', it works.</p>
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<p>I have it linked to a report parameter named ftype whose type is String, which I then use in my dataset to link in as a parameter.</p>
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<p>I know this is a simple question for you but I am struggling and would appreciate the help.</p>
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<p>Thanks.</p>
