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Posts tagged sudoku

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Oracle RDBMS 11gR2 – Solving a Sudoku using Recursive Subquery Factoring

3 years ago
by Anton Scheffer in , , ,

Oracle Database 11g Release 2 introduces a new feature called Recursive Subquery Factoring. My collegue Lucas sees it as a substitute for Connect By based hierarchical querying, Oracle RDBMS 11gR2 – new style hierarchical querying using Recursive Subquery Factoring. When I first was thinking about a pratical use for this feature I couldn’t come up with anything, but on second thought:: solving Sudokus!

Say you have a sudoku like:

(more…)

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Solving a Sudoku with 1 SQL-statement: the Model-clause

5 years ago
by Anton Scheffer in , ,

Solving a Suduku with one SQL-statement, is that possible? A lot of people won’t believe it, but yes, it can be done. (more…)

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Solving a Sudoku with Collections

6 years ago
by Anton Scheffer in , ,

If you want to write a program to solve sudokus, you can use almost any programming language. And PL/SQL too!

(more…)

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