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SQL and assorted database engines tips, tricks, tutorials and articles.

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MySQL Category Tree

 Intermediate 3 years ago (06:24:11pm Tue 7th Mar, 2017)

A method for managing Category trees in MySQL (or other SQL languages) simply, cleanly, and efficiently.

MySQL PHP Database Tutorial

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Circle Intersection

 Intermediate Icon

A simple method for testing if two 2D circles are colliding.

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