Sorting the report in birt <p>I have created a column binding in a report(datetime column) using birt. The datetime value that the column binding fetches based on the value of another string type column. Now when I'm sorting the report based on the column binding, the result that I'm getting is initially sorted on the basis of the string column and then on the basis of the column binding.</p> <p>I want the report to be sorted only on the basis of column binding (datetime) value.</p>