Group By clause causing error

Question

So here is the context : Developping an ASP.NET MVC 4 web app, I have in my database a table ProductAllocations which is composed of 2 foreign keys : one from m

Answer 1

To use a GROUP BY function you need to make sure all of the fields in your SELECT statement are in aggregate functions (e.g. SUM() or COUNT()), or they need to be in the GROUP BY function.