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

The relational database has been acquiring graph query capabilities for some time, but PostgreSQL 19 is set to go further, ...

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 ...