SQL Management Studio Intellisense - Hide global variables
Intellisense, however intelligent it may strive (or claim itself) to be, cannot possibly know that you only want columns in that context. Without that piece of information, therefore, the list will include all items that are valid in the given context.

If you want to make it clear that you are only interested in selecting the table columns, you could qualify the column names with the table name and the syntax will restrict the number of available tokens for you.

Consider this:



Same as in your example.

Now look at this:



You can see that the list only has the column names. To make this easier, I would further suggest you use short aliases for tables, like this: