task: #596

README.md

@@ -41,6 +41,7 @@ Have a good contributing!
     - [577. Employee Bonus](./leetcode/easy/577.%20Employee%20Bonus.sql)
     - [586. Customer Placing the Largest Number of Orders](./leetcode/easy/586.%20Customer%20Placing%20the%20Largest%20Number%20of%20Orders.sql)
     - [595. Big Countries](./leetcode/easy/595.%20Big%20Countries.sql)
+    - [596. Classes With at Least 5 Students](./leetcode/easy/596.%20Classes%20With%20at%20Least%205%20Students.sql)
 2. [Medium](./leetcode/medium/)
     - [176. Second Highest Salary](./leetcode/medium/176.%20Second%20Highest%20Salary.sql)
 

leetcode/easy/596. Classes With at Least 5 Students.sql

@@ -0,0 +1,25 @@
+/*
+Question 596. Classes With at Least 5 Students
+Link: https://leetcode.com/problems/classes-with-at-least-5-students/description/
+
+Table: Courses
+
++-------------+---------+
+| Column Name | Type    |
++-------------+---------+
+| student     | varchar |
+| class       | varchar |
++-------------+---------+
+(student, class) is the primary key (combination of columns with unique values) for this table.
+Each row of this table indicates the name of a student and the class in which they are enrolled.
+
+
+Write a solution to find all the classes that have at least five students.
+
+Return the result table in any order.
+*/
+
+SELECT class 
+FROM Courses
+GROUP BY class
+HAVING COUNT(1) >= 5