How is the rlike function used in SQL?

RLIKE is an operator in MySQL used for matching regular expressions in queries, allowing data to be matched based on specified regular expression conditions.

SELECT * FROM table_name
WHERE column_name RLIKE 'regex_pattern';

In which table_name is the name of the table to be queried, column_name is the name of the column to be matched, and regex_pattern is the regular expression pattern.

For example, the following SQL query will retrieve all records in the table where the column named “column_name” contains the letters “a” or “b”:

SELECT * FROM table_name
WHERE column_name RLIKE '[ab]';

It’s important to note that RLIKE can only be used in MySQL, other database systems may not have this operator.