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MySQL Spalten updaten: Werte aufsteigend setzen.

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Weil ichs gerade für ein TYPO3 Flow Projekt brauchte… 🙂 Notiz an mich:

How to update a MySQL column with ascending numbers

Given the problem you have a new column postion and that column should be updated for all existing rows with ascending numbers. Furthermore these numbers should be generated by a special order. In order to achieve that you could do the following:

SET @pos := 0; UPDATE pages SET position = ( SELECT @pos := @pos + 1 ) ORDER BY updated_at DESC;

Quelle: How to update a MySQL column with ascending numbers – makandropedia