I am trying to split out few values from a database. 

![Sample data](https://i.stack.imgur.com/ZY8Hv.png)

There are two columns, Test and Test\_Parameter. I want to extract those rows which have different "test\_parameter" values for same "Test" value. For example, in my screenshot, I want "Grade:" to be selected as it has different values of Test\_Parameter. I know it has a very simple solution but I am not able to figure it out.