Transforming Table Structure: SQL Query for Aggregating Data

Creating a Column Based on Substring of Another Column Using `case_when` with Alternative Approaches

Understanding the Limitations of Min(date) in SQL Case Statements: Workarounds without Window Functions

Solving the Challenge: Using Hive SQL for Unique Device Counts and Exclusive Usage Determination

Understanding the Problem and Requirements: A Dynamic Join Solution with Correlated Subqueries