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Feb 2 · 1 min read · You are given a table of product launches by company by year. Write a query to count the net difference between the number of products companies launched in 2020 with the number of products companies launched in the previous year. Output the name of ...
Join discussionJan 30 · 1 min read · You are analyzing a social network dataset at Google. Your task is to find mutual friends between two users, Karl and Hans. There is only one user named Karl and one named Hans in the dataset. The output should contain 'user_id' and 'user_name' col...
Join discussionJan 29 · 4 min read · A Holistic View of Data Engineering Design Patterns A Real World Use Case Walkthrough Data Engineering design patterns are best understood not as isolated techniques, but as a journey the journey your data takes from raw ingestion to trusted, busines...
Join discussionJan 26 · 4 min read · 1. GroupBy Using Multiple Data Properties Pattern Description: When data elements need to be grouped by more than one property (e.g., location and device type), you cannot simply pass multiple keys to a standard group transform. Solution: Create a co...
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