Oggi vediamo il seguente esercizio di LeetCode a tema SQL:
Write a solution to find the number of examinations each student attended for each subject.
Return the result table sorted by student_id and …
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SQLLeetCode - 1251 - Average Selling Price
Oggi vediamo il seguente esercizio di LeetCode a tema SQL:
Write a solution to find the average selling price for each product. average_price should be rounded to 2 decimal places. If a product does …
SQLLeetCode - 1211 - Queries Quality and Percentage
Oggi vediamo il seguente esercizio di LeetCode a tema SQL:
We define query quality as:
The average of the ratio between query rating and its position.
We also define poor query percentage as:
The …