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In computing, a regular expression is a specific pattern that provides concise and flexible means to "match" (specify and recognize) strings of text, such as particular characters, words, or patterns of characters. Common abbreviations for "regular expression" include regex and regexp .
This SQL Syntax Reference page shows the syntax for each feature described in the SQL Tutorial. It provides a Quick Reference to SQL. For a further description of SQL functionality, please click the links at the far left on this page.