Solution and walkthrough of a real SQL interview question for Data Scientist and Data Analyst technical coding interviews. This question is marked as easy and is called "Number of Unique Subjects Taught by Each Teacher".
Try this question: https://leetcode.com/problems/number-...
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Playlists:
• StrataScratch Coding Questions [SQL]
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• LeetCode Database Problems [SQL]
• LeetCode Easy Database Problems [SQL]
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• LeetCode Hard Database Problems [SQL]