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What is the most efficient/elegant way to parse a flat table into a tree?
...ndant_id) VALUES
(1,1), (1,2), (1,4), (1,6),
(2,2), (2,4),
(3,3), (3,5),
(4,4),
(5,5),
(6,6);
Now you can get a tree starting at node 1 like this:
SELECT f.*
FROM FlatTable f
JOIN ClosureTable a ON (f.id = a.descendant_id)
WHERE a.ancestor_id = 1;
The output (in MySQL client) lo...
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Will Ness
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answered Oct 28 '08 at 3:44
ArteliusArteliu...
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edited Aug 12 '11 at 11:57
Abel
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edited May 26 '15 at 10:19
simon
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