The syntax for the REGEXP_SUBSTR function in Oracle is: REGEXP_SUBSTR( string, pattern [, start_position [, nth_appearance [, match_parameter [, sub_expression ] ] ] ] ) Parameters or Arguments string The string
This function complies with the POSIX regular expression standard and the Unicode Regular Expression Guidelines. For more information, refer toOracle Regular Expression Support. source_charis a character expression that serves as the search value. It is commonly a character column and can be of any ...
The REGEXP_SUBSTR function use used to return the substring that matches a regular expression within a string. This function returns NULL when no matches are found. An empty string can be returned by this function if the regular expression matches a zero-length string. Uses of Oracle REGEXP_...
is a positive integer that specifies which occurrence of the search pattern that theREGEXP_SUBSTR()function should search for. Theoccurrenceargument is also optional and it defaults to 1, meaning that theREGEXP_SUBSTR()function should search for the first occurrence of the pattern in the source ...
使用regexp_substr函数可以根据正则表达式模式拆分名称字符串。regexp_substr函数是Oracle数据库中的一个函数,用于从字符串中提取满足指定模式的子字符串。 具体使用方法如下: regexp_substr(string, pattern, position, occurrence, match_parameter) string:要进行拆分的字符串。
FUNCTION CheckName(NameStr in VARCHAR2) RETURN integer As BEGIN --符合返回1,不符合返回0 if(NameStr is null or length(NameStr)<2) then return 0; else if(NameStr like '%未取名%') then RETURN 0; end if; if regexp_like(NameStr,'^([a-z]+|[0-9]+|[A-Z]+)$') then ...
在解决“incorrect parameter count in the call to native function 'regexp_substr'”这一问题时,我们可以按照以下步骤进行: 确认'regexp_substr'函数的正确参数个数和类型: regexp_substr函数通常用于从字符串中基于正则表达式提取子字符串。其参数个数和类型可能会根据数据库或编程语言的不同而有所差异。 以O...
Oracle 正则表达式函数-REGEXP_SUBSTR 使用例子 原文在这戳 REGEXP_SUBSTR 5个参数 第一个是输入的字符串 第二个是正则表达式 第三个是标识从第几个字符开始正则表达式匹配。(默认为1) 第四个是标识第几个匹配组。(默认为1) 第五个是是取值范围:
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This function operates on UTF-8 strings using the default locale, even if the locale has been set to something else. If you are porting a regular expression query from an Oracle database, remember that Oracle considers a zero-length string to be equivalent to NULL, whileVerticadoes not. ...