Medium-level leetcode problem to solve count salary categories

In this video, we tackle an SQL challenge to efficiently calculate the number of bank accounts across three salary categories: 💰 Low Salary: Salaries strictly less than $20,000. 💼 Average Salary: Salaries between $20,000 and $50,000 (inclusive). 🏦 High Salary: Salaries strictly greater than $50,000. We focus on optimization techniques to ensure the query runs efficiently, even for large datasets. By combining the power of UNION ALL and conditional filters, we minimize computation while ensuring accurate results. 📚 Example Data: Input: A table of bank account IDs and their respective monthly incomes. Output: A summary table showing the count of accounts in each category, including zero counts. 📝 Key Optimization Tips: ✔️ Use WHERE clauses to reduce unnecessary processing. ✔️ Leverage UNION ALL instead of UNION to avoid duplicate checks. ✔️ Avoid expensive operations like subqueries or nested CASE statements. 📈 Whether you're a beginner or looking to enhance your SQL skills, this video will show you how to write clean, efficient, and optimized queries! 🔔 Don’t forget to like, comment, and subscribe for more SQL tips! 😊