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'm having a bit of a problem with some SQL. I'm trying to do a match from one table to another. It works perfectly except for the last line. As soon as I add it NOTHING gets updated. I'm using SQL ...

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, ...