Question
Consider the following relational schema for an online programming platform: Write appropriate SQL queries for the questions below. For each question write a single query:
Consider the following relational schema for an online programming platform:
Write appropriate SQL queries for the questions below. For each question write a single query:
A. Retrieve the username and ranks of all users from highest to lowest rank [3]
B. Retrieve the username, id and rank of all users who have the lowest rank [3]
C. Retrieve the total number of submissions for each question with "medium" difficulty level. The query should show question id and number of submissions [4]
Consider the following relational schema for an online programming platform:
Write appropriate SQL queries for the questions below. For each question write a single query:
A. Retrieve the username and ranks of all users from highest to lowest rank [3]
B. Retrieve the username, id and rank of all users who have the lowest rank [3]
C. Retrieve the total number of submissions for each question with "medium" difficulty level. The query should show question id and number of submissions [4]
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Medical Image Databases
Authors: Stephen T.C. Wong
1st Edition
1461375398, 978-1461375395
