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In MySQL, how to check for a pattern which is not present within an expression?
MySQL NOT RLIKE operator can be used to check for a pattern which is not present within an expression. The syntax for NOT RLIKE is as follows −
Syntax
NOT RLIKE Pat_not_for_match
Here Pat_not_for_match is the pattern which is not to be matched with the expression.
Example
mysql> Select Id, Name from Student WHERE Name NOT RLIKE '^H'; +------+---------+ | Id | Name | +------+---------+ | 1 | Gaurav | | 2 | Aarav | | 20 | Gaurav | | 21 | Yashraj | +------+---------+ 4 rows in set (0.00 sec)
The above query finds the names from the ‘student’ table which do not have the pattern starts with ‘H’. ^ is a wildcard used with NOT RLIKE and signifies the beginning of the string.
Updated on: 30-Jul-2019
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