Now that you've seen how subqueries work, it's time to get some practice writing them! Not all of the queries will require subqueries, but all will be a bit more complex and require some thought and ...

Now that you've seen how subqueries work, it's time to get some practice writing them! Not all of the queries will require subqueries, but all will be a bit more complex and require some thought and ...

I need to get SUMs from two different related tables, and I'm stumped as to how (and haven't managed to successfully slog through the documentation). SELECT si_invoices.index_id, si_invoices.date, ...