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Start training on this collection. Each time you skip or complete a kata you will be taken to the next kata in the series. Once you cycle through the items in the collection you will revert back to your normal training routine.

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7 kyu
Sum of odd numbers
161,251hhelwich
Arrays
Lists
Mathematics
Fundamentals
7 kyu
Making a changelog
579FArekkusu
Fundamentals
7 kyu
Sum of angles
33,786DemonKing
Geometry
Fundamentals
Retired
Recursion #1 - Factorial (retired)
8,336gabrielsiedler
Fundamentals
Recursion
Mathematics
7 kyu
SQL easy regex extraction
2,724Javatlacati
Regular Expressions
Fundamentals
Data Science
7 kyu
SQL with LOTR: Elven Wildcards
9,349sHale
Fundamentals
SQL
Databases
Data Science
7 kyu
SQL with Street Fighter: Total Wins
8,602sHale
Fundamentals
SQL
Databases
Data Science
7 kyu
SQL with Pokemon: Damage Multipliers
7,242sHale
Fundamentals
SQL
Databases
Data Science
7 kyu
SQL with Harry Potter: Sorting Hat Comparators
9,013sHale
Fundamentals
SQL
Databases
Data Science
7 kyu
GROCERY STORE: Real Price!
3,740baaart
SQL
Databases
Fundamentals
7 kyu
GROCERY STORE: Inventory
10,325baaart
SQL
Databases
Fundamentals
7 kyu
GROCERY STORE: Support Local Products
8,306baaart
SQL
Databases
Fundamentals
7 kyu
Easy SQL: Absolute Value and Log to Base
6,933PG1
Fundamentals
Mathematics
SQL
7 kyu
SQL Basics: Truncating
6,766PG1
Fundamentals
Mathematics
SQL
7 kyu
SQL: Concatenating Columns
13,286PG1
Fundamentals
Strings
SQL
7 kyu
Easy SQL: Bit Length
8,209PG1
Fundamentals
Strings
SQL
7 kyu
SQL: Right and Left
7,276PG1
Fundamentals
SQL
7 kyu
Easy SQL: ASCII Converter
6,250PG1
Fundamentals
Strings
SQL
7 kyu
SQL: Regex String to Table
2,390PG1
Fundamentals
Regular Expressions
SQL
7 kyu
SQL: Disorder
4,842Voile
Fundamentals
SQL
7 kyu
SQL: Padding Encryption
3,848PG1
Fundamentals
SQL
7 kyu
SQL: Regex Replace
5,481PG1
Fundamentals
Regular Expressions
SQL
7 kyu
SQL: Bytes in String from Ints
3,245PG1
Fundamentals
Strings
SQL
7 kyu
SQL Basics: Maths with String Manipulations
9,050PG1
Fundamentals
Strings
SQL
7 kyu
Easy SQL: Moving Values
4,589PG1
Fundamentals
Strings
SQL
7 kyu
Easy SQL: Cube Root and Natural Log
6,745PG1
Fundamentals
Mathematics
SQL
7 kyu
SQL Basics - Trimming the Field
7,471PG1
Fundamentals
SQL
7 kyu
Hello SQL World!
9,920Javatlacati
Fundamentals
SQL
7 kyu
SQL Basics: Simple JOIN with COUNT
19,436matt c
SQL
Databases
Fundamentals
7 kyu
SQL Basics: Simple JOIN
21,457jhoffner
Databases
Fundamentals
SQL