The splitting operation accomplished by the "\w+" expression in this case could be just as easily accomplished with the String.Split method, which would be much faster. Regular expressions are a very powerful tool, but do make sure when you use them that you're using t...
this kind of query also represents an overzealous use of regular expressions. The splitting operation accomplished by the "\w+" expression in this case could be just as easily accomplished with the String.Split method, which would be much faster. Regular expressions are a very powerful tool, bu...
Information technology -- Database languages -- SQL Technical Reports -- Part 1: XQuery Regular Expression Support in SQLdoi:ISO/IEC TR 19075-1:2011ISO/IEC TR 19075-1:2011描述了SQL中的正则表达式支持,它是从Perl派生的ISO/IEC JTC 1/SC 32...
The InfluxDB Cloud Serverless SQL implementation uses thePCRE-likeregular expressionsyntax(excluding some features such as look-around and back-references) and supports the following regular expression functions: regexp_count regexp_count Returns the number of matches that a regular expression has in a...
The SQL Server PATINDEX() function returns the position of a pattern within an input string. Following is the syntax of PATINDEX(): PATINDEX ( '%StringPattern%' , input_string ) The PATINDEX() function accepts two parameters: 1. String_Pattern. This parameter defines character expression th...
(dog | cat) Capture and implicitly number the expression dog | cat (?<pet>dog | cat) Capture subexpression dog | cat and name it pet Examples Some examples of using regular expressions. Example 1: Finding All Select Statements You want to find all SELECT statements in your SQL scripts. ...
\n Function Name \n\n Parameters \n\n Output \n\n Description \n \n RegEx_IsMatch \n\n @input nvarchar(max) \n @pattern nvarchar(max) \n\n Bit (Boolean) \n\n Returns true if the pattern is found in the input string.
(dog | cat)Capture and implicitly number the expressiondog | cat (?<pet>dog | cat)Capture subexpressiondog | catand name itpet Examples Some examples of using regular expressions. Example 1: Finding All Select Statements You want to find all SELECT statements in your SQL scripts. ...
regular expression as variablePosted by: Peter Schall Date: June 19, 2008 10:10AM Hello, I've got a problem with using regular expression were the expression is dynamic i.e. a variable. There are two tables. One (definitions) with a field in which are stored the regular expressions...
It fails with ORA-12727: invalid back reference in regular expression, simply because the final regexp_replace() function didn’t include the STOOGE column. So the query should read like this: select case when regexp_like(stooge, '^[[:alnum:]]+ ([[:alnum:]]+)$') ...