SQL Window Functions: GROUP BY on Steroids – Without Collapsing Rows
Dive into the power of SQL window functions, a transformative tool for data analysis that enables calculations across related table rows without collapsing them like traditional GROUP BY clauses. These functions, categorized into aggregate (like AVG, MAX, MIN, SUM, COUNT), value (ROW_NUMBER, RANK, DENSE_RANK, PERCENT_RANK, NTILE), and ranking (LAG, LEAD, FIRST_VALUE, LAST_VALUE) types, add calculated…
