SQL Challenge: Employee Salary Analytics

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Consider an employees table:
  • employee_id (int)
  • employee_name (varchar)
  • department (varchar)
  • joining_date (date)
  • salary (decimal)
  1. Highest Earner by Department: Find the employee with the highest salary in each department.
  2. Average Salary by Department and Year: Calculate the average salary for each department per year.
  3. Longest Serving Employee: Identify the employee with the longest tenure.
Please provide concise SQL queries for these analyses, emphasizing simplicity and efficiency. Thanks!
 
Joined
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That's not a challenge, that's just working for free.

Here's a challenge: Make a question that tricks ChatGPT into saying something stupid.

Just my opinion.
 

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