Oracle10g Regular Expression
Oracle database 10g added a new feature "Regular Expression" enhancement that can be used with SQL and PL/SQL statements.
There are four regular expression functions :-
The functions REGEXP_SUBSTR, REGEXP_INSTR and REGEXP_REPLACE basically extend the functionality of other well known string functions SUBSTR, INSTR and REPLACE.
REGEXP_LIKE is basically an operator that is similar to existing LIKE operator.
The above regular expression functions are very efficient and powerful.
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