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5 kyu
SQL Statistics: MIN, MEDIAN, MAX
6,052matt c
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5 kyu
Using Window Functions To Get Top N per Group
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Relational division: Find all movies two actors cast in together
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6 kyu
SQL Basics: Simple JOIN and RANK
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4 kyu
Calculating Month-Over-Month Percentage Growth Rate
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6 kyu
SQL Basics: Simple HAVING
20,005matt c
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6 kyu
SQL Basics: Simple NULL handling
8,523matt c
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5 kyu
Integers: Recreation One
27,454g964
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5 kyu
Josephus Survivor
16,996GiacomoSorbi
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Retired
Valid Parentheses
97,895xDranik
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6 kyu
Lottery Ticket
13,683PG1
Completed Languages:
6 kyu
Tortoise racing
32,720g964
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7 kyu
Two Oldest Ages
35,406jhoffner
Completed Languages:
7 kyu
Find how many times did a team from a given country win the Champions League?
3,301PiotrBerebecki
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7 kyu
Find the divisors!
90,282kwy95
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