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Window Functions in PostgreSQL

Get to know tables
OVER()
Computations with OVER()
Aggregate functions with OVER()
OVER() and WHERE
Summary
16. Exercise 2

Instruction

Great! Now, the more difficult exercise!

Exercise

For each purchase, show its:

  • id.
  • the name of the department.
  • the item.
  • the price.
  • the minimum price from all the rows in the query result.
  • the difference between the price and the minimum price.