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AND BETWEEN BINARY CASE DIV IN IS IS NOT IS NOT NULL IS NULL LIKE NOT NOT BETWEEN NOT IN NOT LIKE NOT REGEXP OR REGEX RLIKE SOUNDS LIKE XOR

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MySQL | NOT REGEXP

schedule Aug 10, 2023

Last updated

local_offer

MySQL

Syntax


        
        
            
                
                
                    SELECT expr NOT REGEXP pat;

1. expr | string

The string we are matching with regular expression pattern.

2. pat | regular expression

The regular expression pattern for matching.

Examples

Consider the following table about some students:

student_id	fname	lname	day_enrolled	age	username
1	Sky	Towner	2015-12-03	17	stowner1
2	Ben	Davis	2016-04-20	19	bdavis2
3	Travis	Apple	2018-08-14	18	tapple3
4	Arthur	David	2016-04-01	16	adavid4
5	Benjamin	Town	2014-01-01	17	btown5

The above sample table can be created using the code here.

Basic usage

To check whether student last names do not match the regular expression pattern '[ae]':


        
        
            
                
                
                    SELECT lname, lname NOT REGEXP '[ae]'
FROM students;
                
            
            +--------+-------------------------+
| lname  | lname NOT REGEXP '[ae]' |
+--------+-------------------------+
| Towner |                       0 |
| Davis  |                       0 |
| Apple  |                       0 |
| David  |                       0 |
| Town   |                       1 |
+--------+-------------------------+

Only 'Town' returns 1 as it does not contain an 'a' or an 'e'.

Published by Arthur Yanagisawa

Edited by 0 others

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Official MySQL Documentation

https://dev.mysql.com/doc/refman/8.0/en/regexp.html#operator_not-regexp

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