Commit 78c6e84

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Adding Solution for 2324 and 2346

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	`1`	`+WITH grouped_sales AS (`
	`2`	`+ SELECT product_id,user_id,SUM(quantity) AS quantity`
	`3`	`+ FROM sales_2324`
	`4`	`+ GROUP BY product_id,user_id`
	`5`	`+),`
	`6`	`+ranked_sales AS (`
	`7`	`+ SELECT s.product_id,s.user_id,s.quantity*p.price AS spent,`
	`8`	`+ RANK() OVER (PARTITION BY s.user_id ORDER BY s.quantity*p.price DESC) AS rnk`
	`9`	`+ FROM grouped_sales s`
	`10`	`+ INNER JOIN product_2324 p ON s.product_id = p.product_id`
	`11`	`+)`
	`12`	`+SELECT user_id,product_id`
	`13`	`+FROM ranked_sales`
	`14`	`+WHERE rnk = 1;`

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	`1`	`+SELECT student_id,department_id,`
	`2`	`+ ROUND((RANK() OVER (PARTITION BY department_id ORDER BY mark DESC)-1)*100/`
	`3`	`+ (COUNT(student_id) OVER (PARTITION BY department_id)-1),2) AS percentage`
	`4`	`+FROM students_2346;`

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