What is the most efficient/elegant way to parse a flat table into a tree?

What is the most efficient/elegant way to parse a flat table into a tree?

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How can I compare two sets of 1000 numbers against each other?

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How to rotate a table 45 degrees and save the result into another table?

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What's the best way to dedupe a table?

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Given an RGB value what would be the best way to find the closest match in the database?

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How to code a simple versioning system?

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Challenge,how to implement an algorithm for six degree of separation?

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How to select similar sets in SQL

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Procedurally transform subquery into join

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SQL efficient schedule generation algorithm

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Spaced repetition (SRS) for learning

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Achieve hierarchy, Parent/Child Relationship in an effective and easy way

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SQL Server query to find all routes from city A to city B with transfers

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Allen's Interval Algebra operations in SQL

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Algorithm to find keywords and keyphrases in a string

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