SQL remains the foundation for turning raw records into reports and business insights across industriesCore queries like ...

Getting ready for a SQL interview can feel like a big task. There are so many things to know, and interviewers love to ask about them! This guide is here to help. We’ve gathered some of the most ...

Hello, I have a query where Postgres and DuckDB handle aggregations differently. Our understanding is that this is a case where the SQL standard is vague and wanted to ask what semantics you mean to ...

A small but annoying change in iOS 26 beta has been driving Mail app users bananas since June. As of beta 5, however, Apple has reverted that change and avoided making even more people complain. The ...

It’s official: Peacock’s with-ads plan is now the priciest of its big-name streaming competitors. At the same time, Peacock has rolled out a new, cheaper plan aimed at budget-conscious ...

1️) Scalar Subquery in SELECT: SELECT e.emp_id, e.emp_name, e.salary, (SELECT ROUND(AVG(salary), 2) FROM employees WHERE dept_id = e.dept_id) AS dept_avg_salary FROM employees e; 2️) Correlated ...