Have you ever surfed the internet and felt overwhelmed by personalized advertisements that appear to know your every desire? Have you ever been amazed at how accurate some weather forecasts can be? These actions are based on data processing. EsProc SPL and SQL (note, SPL stands for Structured Processing Language and SQL stands for Structured Query Language). SQL is a major language widely encountered and used for data manipulation within relational databases. While EsProc SPL is another effective tool for data processing, especially suited for complex computations and in-memory operations, it is less commonly encountered. Both languages can serve different