Add a description, image, and links to the hackerrank-sql-certification topic page so that developers can more easily learn about it.

Add a description, image, and links to the hackerrank-sql-advanced-certificate-test-solutions topic page so that developers can more easily learn about it.

Getting good at SQL for interviews can feel like a puzzle. You know the basics, but putting them together in a way that impresses people is another thing entirely. Luckily, there are great tools out ...