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Debunking GROUP BY Myths

(Roland Bouman) There is a popular myth about the SQL GROUP BY clause. The myth holds that ‘standard SQL’ requires columns referenced in the SELECT list of a query to also appear in the GROUP BY clause, unless these columns appear exclusively in an aggregated expression. MySQL is often accused of vi

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Put XHTML 2 to work now

(Bob DuCharme) The XHTML 2 specification isn’t finished, but it already has many advantages over XHTML 1, including a greater structural richness that will make it more viable than its predecessor as an editorial format to serve as the central schema for a single-source publishing system. Without wa