SQL Advent Challenge 2017: Day 21

Task #21:

Santa Claus wants to buy some surprises for children from Argentina who either didn’t ask him for any toys  or simply didn’t send him any letters. Help Santa Claus find the names of these children. Sort the records by child name in ascending order.

Answer 21 for the crossword:

The name of the last child in the result set.

Challenge Accepted?

Use the SQL Advent Challenge sandbox to solve tasks and practice writing all kinds of SQL queries.

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