Report the code of every country where at least two different languages are spoken. Rename the column to "bilingualcode". We use the keyword $"$as$"$ to rename a column. For example:

select code as a$,$ name as b

from country;

We encourage you to use a self$-$join to do this question, but in order to do this you'll need to rename a table. The table$-$renaming syntax is simply to include a new table name after the old one. For example $($this one is not a self$-$join$)$:

select $*$

from country c$,$ language l

where c$.$code $=$ l$.$countrycode;

Note that the FROM clause above might look like a Cartesian product of four tables; pay attention to commas!