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ORA-12727: Invalid Back Reference In Regular Expression

August 17, 2020August 17, 2020 Kaley Crum

If you’ve run across ORA-12727: invalid back reference in regular expression, it’s because you’ve referenced a group (a group is an expression enclosed in parenthesis) either that doesn’t exist, or doesn’t exist yet. There are two common reasons for this… Read More

Oracle, Oracle Error Messages, Problems and Troubleshooting, Regular ExpressionsLeave a comment

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