match_type: A string that specifies how to perform matching. The meaning is as described for REGEXP_LIKE(). Prior to MySQL 8.0.17, the result returned by this function used the UTF-16 character set; in MySQL 8.0.17 and later, the character set and collation of the expression searched f...
1 一个 SQL 语句中的 select_expression 或 where_definition 可由任何使用了下面所描述函数的表达式组成...
The occurrence argument is also optional and it defaults to 1, meaning that the REGEXP_SUBSTR() function should search for the first occurrence of the pattern in the source string. 5) match_parameter is a literal string that determines the default matching behavior for the REGEXP_SUBSTR() fu...
Is a positive integer that determines for which occurrence of the pattern in the string the function should search. By default, the occurrence is 1, meaning that the function searches for the first occurrence of pattern. return_option (optional) The return_option can be 0 and 1. If return_...
For a listing of the operators you can specify in pattern, refer to Oracle Regular Expression Support. position is a positive integer indicating the character of source_char where Oracle should begin the search. The default is 1, meaning that Oracle begins the search at the first character ...
'USA|UK': The pattern to match. The pipe symbol (|) acts as an OR operator in regular expressions, meaning the pattern matches either 'USA' or 'UK'. Output: aut_id|aut_name |country|home_city| ---+---+---+---+ AUT001|William Norton |UK |Cambridge|...
positionis a positive integer indicating the character ofsource_charwhere Oracle should begin the search. The default is 1, meaning that Oracle begins the search at the first character ofsource_char. occurrenceis a positive integer indicating which occurrence ofpatterninsource_charOracle should search...
Metacharacters are characters with a special meaning:MetacharacterDescriptionTry it \d Find a digit Try it » \s Find a whitespace character Try it » \b Find a match at the beginning of a word like this: \bWORD, or at the end of a word like this: WORD\b Try it » Try it ...
1exec() Executes a search for a match in its string parameter. 2test() Tests for a match in its string parameter. 3toSource() Returns an object literal representing the specified object; you can use this value to create a new object. ...
"n" in match-parameter allows the period to match the new line character "m" in match-parameter allows for more than one line in source-string The metacharacters list: MetacharactersMeaning \ Specify the escape sequence \d Digit character \D Non-digit character \w Word character \W Non-word...