Read this SQL tutorial to learn when to use SELECT, JOIN, subselects and UNION to access multiple tables with a single statement. It’s sometimes difficult to know which SQL syntax to use when ...

SQL has dominated data querying for decades. Newer query languages offer more elegance, simplicity, and flexibility for modern use cases. For the last three decades, databases and Structured Query ...

So much of modern programming is about string manipulation. Whether it’s parsing XML content, building HTML for the browser or trying to understand what the user just typed into that text entry field, ...

Apache Phoenix is a relatively new open source Java project that provides a JDBC driver and SQL access to Hadoop’s NoSQL database: HBase. It was created as an internal project at Salesforce, open ...