SQL Trainer
Spring 2025
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Osa 1
Osa 2
Osa 3
all
x/y solved
7
8
9
10
11
Task 11
Hae kaikki eri etunimet.
Example
Input
Names
id
first_name
last_name
1
Anna
Korhonen
2
Anna
Virtanen
3
Pekka
Korhonen
4
Pekka
Lahtinen
5
Pekka
Korhonen
Output
Anna
Pekka
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