REGEXP_SUBSTR('Yababa dababa do','(ab)\1'), backreference option : Group « Regular Expressions « Oracle PL / SQL

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Oracle PL / SQL » Regular Expressions » Group

REGEXP_SUBSTR('Yababa dababa do','(ab)\1'), backreference option






SQL> --pattern is matched. If we use the backreference option, the query looks like this:

SQL>

SQL> SELECT REGEXP_SUBSTR('Yababa dababa do','(ab)\1')FROM dual;



REGE

----

abab



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

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