Post #2428

✅Top 5 SQL Aggregate Functions with Examples📊💡 1️⃣ COUNT() Counts rows or non-null values—use COUNT(*) for total rows, COUNT(column) to skip nulls. Example: SELECT COUNT(*) AS total_employees FROM Employees; Tip: In a 1k-row table, it returns 1k; great for validating data completeness. 2️⃣ SUM() Adds up numeric values—ignores nulls automatically. Example: SELECT SUM(salary) AS total_salary FROM Employees; Tip: For March orders totaling $60, it sums to 60; pair with WHERE for filtered totals like monthly payroll. 3️⃣ AVG() Calculates average of numeric values—also skips nulls, divides sum by non-null count. Example: SELECT AVG(salary) AS average_salary FROM Employees; Tip: Two orders at $20/$40 avg to 30; use for trends, like mean salary ~$75k in tech firms. 4️⃣ MAX() Finds the highest value in a column—works on numbers, dates, strings. Example: SELECT MAX(salary) AS highest_salary FROM Employees; Tip: Max order of $40 in a set; useful for peaks, like top sales $150k. 5️⃣ MIN() Finds the lowest value in a column—similar to MAX but for mins. Example: SELECT MIN(salary) AS lowest_salary FROM Employees; Tip: Min order of $10; spot outliers, like entry-level pay ~$50k. Bonus Combo Query: SELECT COUNT(*) AS total, SUM(salary) AS total_pay, AVG(salary) AS avg_pay, MAX(salary) AS max_pay, MIN(salary) AS min_pay FROM Employees; 💬Tap ❤️ for more!