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Pattern matching is a technique used in programming languages to match a specific pattern within a string. It is used to find specific patterns within text data. The most commonly used operator for pattern matching is the **regular expression (regex) operator** . Regular expressions are powerful and flexible tools that allow you to match anything from a single character to a complex pattern.
In SQL, the **LIKE operator** performs pattern matching. It is used in a WHERE clause to search for a specified pattern in a column. MySQL also has an extended regular expression pattern matching using the REGEXP_LIKE (column_name, ‘regex’) function, which takes the column name and the regular expression as parameters.
In C#, you can use **switch expressions** and **switch statements** for pattern matching. In those constructs, you can match an input expression against any of the following patterns: Declaration pattern: to check the run-time type of an expression and, if a match succeeds, assign an expression result to a declared variable. Type pattern: to check the run-time type of an expression .
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