Master programming concepts with hands-on coding challenges. Write, debug, and optimize code with real-time feedback and explanations.
Sample questions
In the "codeSnippet", what does the function do with the "ORDER BY" and "ROWS BETWEEN UNBOUNDED PRECEDING AND CURRENT ROW"?
In the "codeSnippet", how is the "NTILE(4)" function splitting the dataset?
Given the code in "codeSnippet", what value does the "RANK()" function assign to the third row if the second and third rows have identical sales values?