RE: SEC S20W2 || Databases and SQL language - Part 2

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SEC S20W2 || Databases and SQL language - Part 2

in dynamicdevs-s20w2 •  last month 
Thank you, @abdullahw2, for publishing an article using our tag #dynamicdevs-s20w2. We have assessed your article and present the results of the evaluation below.

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Free of Plagiarism
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Comment/Recommendation

Exercise 1: SQL Query with Joins and Aggregates (2/2)

  • You provided a clear and correct query, demonstrating a solid understanding of SQL joins and aggregate functions. Your explanation was concise and precise. Great work on this task!

Exercise 2: Using Subqueries and Aggregate Functions (2.5/3)

Query b): Your query works well, but you could improve it by further clarifying how NULL values are handled in subqueries.

  • Overall, your subquery and aggregate function usage is correct, but some details regarding NULL handling could be expanded upon to further refine your solution. Well done, nonetheless.

Exercise 3: Write the SQL Queries (4/5)

  • Your SQL queries are efficient, and the explanations provided show a strong grasp of the concepts. One query had a minor optimization issue regarding the GROUP BY clause, but your approach was clear and effective.

Total | 8.5/10

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Thank you so much dear Sir for your kind evaluation 🤠