title: Mysql query inside radians function not working. Why?
body: <p>This works:</p>
  <pre><code>SELECT
      (
          radians(
              44.43763930
          )
      )
  </code></pre>
  <p>This doesn't:</p>
  <pre><code>SELECT
      (
          radians(
              SELECT
                  latitude
              FROM
                  coords
              WHERE
                  coord_id = '1234'
          )
      )
  </code></pre>
  <p>I don't get it. Where is the problem ?</p>
  <p>I try to cast the query result into decimal, but stil doesn't work.</p>