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 ...

Although tables in SQL databases typically contain massive amounts of data, they’re not always in a format that can be used by data analysts. The data records in these tables need to be filtered ...

If your eyes glazed over at the recent announcement of an “SQL injection” vulnerability in WordPress, take heart. You’re not alone. SQL injection attacks are a common kind of security flaw, but are ...