Hi Austinn
I don't know exactly what you mean by "generate some columns". Let me explain the possibilities:
A. You could Edit the entity at LLBLGen Pro Designer and remove some columns you don't want to generate in your code. That means that the entity will have just some columns. For instance, consider the following table:
Customer
CustomerId
CustomerName
Phone
PetName
Now, you don't want to use the PetName field at your code, you can remove it. That means that you wont be able to access it at your code.
B. You can Include/Exclude fields in the fetch action. For example, you can map all the fields from your table to the entity so they all are available at your code, but you just want to fetch some fields, you can use this option. That means that the entity will have all the fields but just some of them will be filled.
C. If you just want a list of objects that contains just a couple of fields you can use TypedViews, TypedLists or DynamicLists. Please read the manual from the links I posted to understand the differences.
So, it's up to you, just confirm what you are trying to achieve. Hope helpful