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SQL Anywhere 12.0.1 » SQL Anywhere Server - SQL Reference » SQL language elements » Expressions


Regular expressions syntax

Regular expressions are supported with the SIMILAR TO, and REGEXP search conditions, and the REGEXP_SUBSTR function. For SIMILAR TO, regular expression syntax is consistent with the ANSI/ISO SQL standard. For REGEXP and REGEXP_SUBSTR, regular expression syntax and support is consistent with Perl 5.

Regular expressions are used by REGEXP and SIMILAR TO to match a string, whereas regular expressions are used by REGEXP_SUBSTR to match a substring. To achieve substring matching behavior for REGEXP and SIMILAR TO, you can specify wildcards on either side of the pattern you are trying to match. For example, REGEXP '.*car.*' matches car, carwash, and vicar. Or, you can rewrite your query to make use the REGEXP_SUBSTR function.

Regular expression matching with SIMILAR TO is case- and accent-insensitive. REGEXP and REGEXP_SUBSTR is not affected by the database accent and case sensitivity.

 Regular expressions: Metacharacters
 Regular expressions: Special sub-character classes
 Regular expressions: Other supported syntax conventions
 Regular expressions: Assertions
 See also