Il existe trois différents approches aux correspondances de modèles fournies par PostgreSQL: l'opérateur SQL traditionnel LIKE, le plus récent SIMILAR TO (ajouté dans SQL:1999) et les expressions rationnelles du type POSIX.
There are three separate approaches to pattern matching provided by PostgreSQL: the traditional SQL LIKE operator, the more recent SIMILAR TO operator (added in SQL:1999), and POSIX-style regular expressions.
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