Formula in expression field for a column
<p>I used an expression for one of my columns in a data table like this:</p>

<pre><code>(col2-col1)*col3/100
</code></pre>

<p>col2 and col1 are bigint and col3 is smallint</p>

<p>But, finally as a result it returns a number that is not exactly what it must be.</p>

<p>For example:</p>

<p>(100000-0)*10/100 will return 9999</p>

<p>Why?</p>
