It used to be that finding and using a sample SQL database was quite simple. In fact, the venerable Pubs database used to be installed as part of the SQL Server installation process. Fast forward to ...

PostgreSQL subqueries allow one SQL query to run inside another, making it possible to solve filtering, aggregation, ...

Here's a look at different ways to query Hadoop via SQL, some of which are part of the latest edition of MapR's Hadoop distribution SQL: old and busted. Hadoop: new hotness. That’s the conventional ...