Validating forms in perl
When coupled with native SQL, the use of regular expressions makes it possible to perform powerful search and manipulation operations on any data stored in an Oracle database.
You can use this feature to easily solve problems that would otherwise be very complex to program.
Perl Regular Expression Extensions In addition to the POSIX standard, Oracle supports the common Perl-influenced meta characters.
If you are a life sciences developer who relies on Perl to do pattern analysis on bioinformatics data stored in huge databases of DNAs and proteins, you can use SQL Regular Expression support directly on the data rather than from the middle tier. The metacharacters added for Perl compatability are: For more information on Perl-Influenced Extensions in Oracle Regular Expressions, refer to the Oracle Database Application Developer's Guide - Fundamentals 10g Release 2 (10.2), chapter 4 "Using Regular Expressions in Oracle Database".
The implementation complies with the Portable Operating System for UNIX (POSIX) standard, issued by the Institute of Electrical and Electronics Engineers (IEEE), for ASCII data-matching semantics and syntax.
Oracle Database 10g introduces support for regular expressions.
This can include one or more of the following values: In this function: position: is the search starting position occurrence: is the occurrence to search for replacestr: is the character string replacing pattern match_option: provides the option to change default matching.
This can include one or more of the following values: table, you can perform a full scan on the column.
However, this would result in hundreds of rows being returned, because it lists a specific HTML page location within a number of catalog domains.
In this example, you want to find only the individual domain names themselves and not the lower-level pages they contain.