Coach note
Interviewers ask this kind of question to surface how you think, not what you remember. The strongest answers are specific, calmly told, and end on what changed.
SQL · Window functions
From a transactions table with user_id, ts, and amount, write a query that returns each user's running total ordered by time.
Type your answer
0of ~180 wordsAbout a minute spoken
Voice isn’t supported in this browser — type your answer in the box.
Create a free account to get more critiques.
Your answer appears here as you speak.