Using backreference: REGEXP_REPLACE('H1234 H4321 H2345','(.) (.) (.*)','\3, \2 \1') : Group « Regular Expressions « Oracle PL / SQL

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Oracle PL / SQL » Regular Expressions » Group

Using backreference: REGEXP_REPLACE('H1234 H4321 H2345','(.*) (.*) (.*)','\3, \2 \1')





SQL> --For a better example of using backreference, let's suppose we wanted to convert a 

name in the form "first middle last" into the "last, middle first" format. Consider this command:

SQL>

SQL> SELECT REGEXP_REPLACE('H1234 H4321 H2345','(.*) (.*) (.*)','\3, \2 \1')FROM dual;



REGEXP_REPLACE('H1

------------------

H2345, H4321 H1234



SQL>

SQL>

Related examples in the same category

1.	Group the letters 'ir' together by putting them in parentheses
2.	Parenthesize both expressions
3.	REGEXP_SUBSTR('Yababa dababa do','(ab)')
4.	REGEXP_SUBSTR('Yababa dababa do','(ab)\1'), backreference option

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Using backreference: REGEXP_REPLACE('H1234 H4321 H2345','(.*) (.*) (.*)','\3, \2 \1') : Group « Regular Expressions « Oracle PL / SQL

Using backreference: REGEXP_REPLACE('H1234 H4321 H2345','(.) (.) (.*)','\3, \2 \1') : Group « Regular Expressions « Oracle PL / SQL