title: Replace null values with just a blank
body: <p>I currently have a sql statement that outputs data into an excel document. However, every time there is a cell that doesn't have data, it outputs <code>NULL</code> into the cell. I was wondering if there was a way that I could replace <code>NULL</code> with just a blank space? Someone suggested using coalesce to do this, however I haven't ever had the chance to use it so I will have to do some reading on it. Anyone have any other suggestions?</p>