Today I explored SQL functions small, built-in commands that transform or summarize data. They’re grouped into: 💡 Practical Example Idea: Use DATEPART() to extract the month from an admission date, then group admissions by month for seasonal trend analysis in respiratory illnesses. I’m still experimenting with these on sample data, but the potential for transforming…
Tag: clinician learning SQL
Advanced Filtering in SQL (AND, OR, NOT)
As I get deeper into SQL, today’s focus was on logical filtering operators — AND, OR, and NOT. These are the building blocks for refining queries and narrowing down datasets. By mastering these logical filtering operators, I can create more precise queries that yield the exact results I need. Understanding these filtering data techniques in…