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 new SQL Server 2025 feature lets organizations run vector-based semantic searches on their own data, connecting to local or cloud-hosted AI models without relying on massive general-purpose LLMs. I ...

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 ...

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 ...