Watch tutorials and explanations by expert teachers that walk through solving this problem.
Sajjaad Khader
NeetCodeIO
Everyday Data Science
Everyday Data Science
Nick White
![MLV Prasad - LeetCode SQL [ EASY ] | 1421 | "NPV Queries" |](https://i.ytimg.com/vi/6JQy1S0QrKA/hq720.jpg?sqp=-oaymwEXCNAFEJQDSFryq4qpAwkIARUAAIhCGAE=&rs=AOn4CLA7CMgN3Tydmf2JwfDiL061J_65gQ)
Data Science University - MLV Prasad
![MLV Prasad - LeetCode Pandas [ Easy ] | 1421 | " NPV Queries" |](https://i.ytimg.com/vi/T4CWiy42P88/hq720.jpg?sqp=-oaymwEXCNAFEJQDSFryq4qpAwkIARUAAIhCGAE=&rs=AOn4CLDfI64gr2aAHjj5sogy2j2byb2tBg)
Data Science University - MLV Prasad
Sleepy Cracker
