Warning: Null value is eliminated by an aggregate or other S

I dont think so it will cause problem. As we know when we perform some maths operation we need some number and in case of sql of sql if the field is null then it will consider the value as 0 and then execute it.

For detail check the link

http://stackoverflow.com/questions/18719436/getting-warning-null-value-is-eliminated-by-an-aggregate-or-other-set-operation

http://stackoverflow.com/questions/11384292/warning-null-value-is-eliminated-by-an-aggregate-or-other-set-operation-in-aqua

I don't think this warning will cause serious issues.

 

Check here for details:

 

 http://blog.sqlauthority.com/2015/02/13/sql-server-warning-null-value-is-eliminated-by-an-aggregate-or-other-set-operation/