Use the Newest Exam4 Software. For the Fall 2025 December exam period you must use Exam4 Release 24.2.9 for Mac or Release 25.2 for Windows, both of which expire January 30, 2026. Take a Practice Exam ...

SQL Case Files is a free interactive SQL game that teaches SQL through crime-solving challenges. Learn SQL online with hands-on puzzles, realistic datasets, SQL practice exercises, and a full ...

Abstract: The penetration test is a crucial way to enhance the security of web applications. Improving accuracy is the core issue of the penetration test research. The test case is an important factor ...

Learning SQL is a great move for anyone working with data, but actually getting good at it can feel tricky, especially if you don’t have a database handy. Luckily, there are tons of free places online ...

Your browser does not support the audio element. There are a large number of utilities for generating test data. But in some cases, you may wish to generate this data ...

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 ...

SQL, the Structured Query Language, is a cornerstone skill for anyone working with data. To master this powerful language, consistent practice is crucial. We present a curated list of 12 top-notch ...

When I try to run tests (even on a freshly created dbt project), they consistently fail. When I "dbt test --debug" I see malformed SQL. See generated code below: USE ...

SQL, or Structured Query Language, is like the language of databases. It’s a way for computers to understand and manage data. Whether one is aiming to be a data analyst, scientist, or engineer, SQL is ...