Ezy one_liner MySQL
Intuition\n Describe your first thoughts on how to solve this problem. \nIntuition Behind the Query\nThe query retrieves all class values from the courses table
# Intuition\n<!-- Describe your first thoughts on how to solve this problem. -->\nIntuition Behind the Query\nThe query retrieves all class values from the courses table where the number of students in each class is at least 5. The logic is as follows:\n\nGROUP BY class: This groups all rows in the courses table by the class column. Each unique class becomes a group.\nCOUNT(student): Within each group, it counts the number of rows (representing students).\nHAVING count(student) >= 5: After counting, only those groups (classes) where the count is 5 or more are kept in the result.\nSELECT class: Finally, it outputs the class names that meet the condition.\nThis query is particularly useful in scenarios where we need aggregated information about groups based on a condition (e.g., finding classes with a minimum number of enrolled students).\n\n# Approach\n<!-- Describe your approach to solving the problem. -->\nGrouping:\n\nUse the GROUP BY clause to group the rows by class. This forms partitions of data based on the class column.\nAggregation:\n\nWithin each group, the COUNT(student) function calculates the number of students associated with that class.\nFiltering Groups:\n\nThe HAVING clause is used to apply a condition on aggregated results. Only groups where the count of students is greater than or equal to 5 pass through the filter.\nSelecting the Results:\n\nFinally, select the class values for the filtered groups.\n\n\n# Complexity\n- Time complexity: **O(NlogN)**\n<!-- Add your time complexity here, e.g. $$O(n)$$ -->\n\n\n- Space complexity: **O(N)**\n<!-- Add your space complexity here, e.g. $$O(n)$$ -->\n\n\n# Code\n```mysql []\n# Write your MySQL query statement below\nselect class from courses group by class having count(student) >= 5;\n\n```\n# THANKS\n\nI\'m still learning if have any better solution or suggestions you can comment down below, If you found my solution helpful, even in the slightest, I\u2019d really appreciate an upvote. Thank you!:]\n
['MySQL']