MariaDB Regular Expressions

MariaDB provides regular expression based matching through the REGEXP Operator.

Syntax:

Parameter Explanation:

expression: A character expression such as a column or field.

pattern: The regular expression matching information. A pattern can be a combination of the following:

Value	Description
^	Matches the beginning of a string. if used with a match_parameter of 'm', it matches the start of a line anywhere within expression.
$	Matches the end of a string. if used with a match_parameter of 'm', it matches the end of a line anywhere within expression.
*	Matches zero or more occurrences.
+	Matches one or more occurrences.
?	Matches zero or one occurrence.
.	Matches any character except null.
\|	Used like an "or" to specify more than one alternative.
[ ]	Used to specify a matching list where you are trying to match any one of the characters in the list.
[^ ]	Used to specify a nonmatching list where you are trying to match any character except for the ones in the list.
( )	Used to group expressions as a subexpression.
{m}	Matches m times.
{m,}	Matches at least m times.
{m,n}	Matches at least m times, but no more than n times.
\n	n is a number between 1 and 9. matches the nth subexpression found within ( ) before encountering \n.
[..]	Matches one collation element that can be more than one character.
[::]	Matches character classes.
[==]	Matches equivalence classes.
\d	Matches a digit character.
\d	Matches a non-digit character.
\w	Matches a word character.
\w	Matches a non-word character.
\s	Matches a whitespace character.
\s	Matches a non-whitespace character.
*?	Matches the preceding pattern zero or more occurrences.
+?	Matches the preceding pattern one or more occurrences.
??	Matches the preceding pattern zero or one occurrence.
{n}?	Matches the preceding pattern n times.
{n,}?	Matches the preceding pattern at least n times.
{n,m}?	Matches the preceding pattern at least n times, but not more than m times.

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