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What are the different wildcard characters that can be used with MySQL RLIKE operator?
The use of wildcards with RLIKE operators can save a lot of effort when we write a query that looks for some pattern (regular expression) in character string. The wildcards used with RLIKE are:
^ − It signifies BEGINING of the string. In other words when we use this wildcard with RLIKE operator then it will find the pattern that begins with the particular string written after ^ wildcard
Example
mysql> Select Id, Name from Student WHERE Name RLIKE '^H'; +------+---------+ | id | Name | +------+---------+ | 15 | Harshit | +------+---------+ 1 row in set (0.00 sec)
$ − It signifies END of the string. In other words when we use this wildcard with RLIKE operator then it will find the pattern that ends with the particular string written after $ wildcard.
Example
mysql> Select Id, Name from Student WHERE Name RLIKE 'v$'; +------+--------+ | Id | Name | +------+--------+ | 1 | Gaurav | | 2 | Aarav | | 20 | Gaurav | +------+--------+ 3 rows in set (0.00 sec)
| −It means OR. In other words when we use this wildcard with RLIKE operator then it will find the string which will have either substring written with | wildcard.
Example
mysql> Select Id, Name from Student WHERE Name RLIKE 'Gaurav|raj'; +------+---------+ | Id | Name | +------+---------+ | 1 | Gaurav | | 20 | Gaurav | | 21 | Yashraj | +------+---------+ 3 rows in set (0.00 sec)
Updated on 20-Jun-2020 11:03:30
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