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6 kyu
SQL Basics: Simple NULL handling
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SQL Basics: Simple table totaling.
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SQL Basics: Simple JOIN and RANK
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SQL Basics: Top 10 customers by total payments amount
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7 kyu
Sum of odd numbers
164,380hhelwich
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SQL with Harry Potter: Sorting Hat Comparators
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7 kyu
SQL: Concatenating Columns
13,404PG1
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8 kyu
Register for the Party (SQL for Beginners #3)
21,289MaikelNabil
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6 kyu
Unique In Order
184,154pinelopi
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7 kyu
SQL with LOTR: Elven Wildcards
9,447sHale
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GROCERY STORE: Support Local Products
8,401baaart
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7 kyu
GROCERY STORE: Inventory
10,462baaart
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7 kyu
SQL Basics: Up and Down
8,055PG1
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SQL Basics - Position
11,139PG1
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Disemvowel Trolls
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