- (*) requires knowledge and experience in SQL or PL/SQL but not expert one, or is a known problem, can be solved in less than an hour by an expert
- (**) requires expert skills, combines several techniques like analytic functions, hierarchy query, aggregate... can be solved in a couple of hours to one day by an expert
- (***) requires high level, complex or little known features (model, xquery, 11g, 12c... new features...), may require several days of work to be solved by an expert.

Puzzle n°00 - Row generator *

Puzzle n°01 - Finding adjacent seats in theater **

Puzzle n°02 - Hiding names in crossword array **

Puzzle n°03 - Sharing articles ***

Puzzle n°04 - Evenly share batches of articles into groups *** (>= 10g)

Puzzle n°05 - All the possible ways to get the factorial of a number *

Puzzle n°06 - Right-handed helix of Numbers **

Puzzle n°07 - Create A Calendar for the Given Month and Year *

Puzzle n°08 - Display the Numerical Pyramid using straight SQL query (Not PL/SQL) **

Puzzle n°09 - Finding a query for sine function distribution **

Puzzle n°10 - All possible solution for Fibonacci Series *

Puzzle n°11 - Dynamic reshuffling of a given string **

Puzzle n°12 - Arithmetic expressions for a given result (24 game) *

Puzzle n°13 - Light bulbs *

Puzzle n°14 - Calculating hardcoded arithmetic expressions and formulas ***

Puzzle n°00 - Row generator *

Puzzle n°05 - All the possible ways to get the factorial of a number *

Puzzle n°07 - Create A Calendar for the Given Month and Year *

Puzzle n°10 - All possible solution for Fibonacci Series *

Puzzle n°12 - Arithmetic expressions for a given result (24 game) *

Puzzle n°13 - Light bulbs *

Puzzle n°01 - Finding adjacent seats in theater **

Puzzle n°02 - Hiding names in crossword array **

Puzzle n°06 - Right-handed helix of Numbers **

Puzzle n°08 - Display the Numerical Pyramid using straight SQL query (Not PL/SQL) **

Puzzle n°09 - Finding a query for sine function distribution **

Puzzle n°11 - Dynamic reshuffling of a given string **

Puzzle n°03 - Sharing articles ***

Puzzle n°04 - Evenly share batches of articles into groups *** (>= 10g)

Puzzle n°14 - Calculating hardcoded arithmetic expressions and formulas ***

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