Julia Programming Projects

@select

The @select query command, similar to its SQL SELECT counterpart, indicates which values are to be returned. Its general syntax is @select condition, where condition can be any Julia expression. Most commonly, we'll want to return the whole row and, in this case, we'll just pass var itself. For instance, let's create a new DataFrame to hold a shopping list:

julia> shopping_list = DataFrame(produce=["Apples", "Milk", "Bread"], qty=[5, 2, 1]) 

The output is as follows:

A cool (geeky!) and handy shopping list.

We can @select the whole row with the following:

@from p in shopping_list begin 
    @select p 
end 

It's not very useful, as this basically ...