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5 kyu
Calculating Running Total
4,771pmatseykanets
Completed Languages:
4 kyu
Challenge: Two actors who cast together the most
3,411pmatseykanets
Completed Languages:
5 kyu
Relational division: Find all movies two actors cast in together
7,790pmatseykanets
Completed Languages:
7 kyu
SQL: Concatenating Columns
13,933PG1
Completed Languages:
6 kyu
Numbers of Letters of Numbers
2,526marbiru
Completed Languages:
6 kyu
Happy Numbers
959TySlothrop
Completed Languages:
6 kyu
Happy numbers to the n power
498CursedFlames
Completed Languages:
6 kyu
Happy numbers
1,912knotman90
Completed Languages:
5 kyu
SQL Basics: Group By Day
7,597jhoffner
Completed Languages:
6 kyu
SQL Basics: Simple NULL handling
8,489matt c
Completed Languages:
7 kyu
Easy SQL: Counting and Grouping
15,800PG1
Completed Languages:
7 kyu
SQL Basics: Simple JOIN with COUNT
20,509matt c
Completed Languages:
6 kyu
Buying a car
18,257g964
Completed Languages:
4 kyu
Sum Strings as Numbers
46,213nicknovitski
Completed Languages:
6 kyu
Sum the nums, sum the sums and sum the nums up to that sum
989slimedog
Completed Languages:
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