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Substring to fetch only charahters in even postion

ORA_CAREFeb 9 2016 — edited Mar 2 2016

Looking for regular expression function to replace the charachters in odd postion to null value.

example:

Input string = '1213441516871819'

output string = '23456789'

oracle version 11.2

Thanks
This post has been answered by BluShadow on Feb 9 2016
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Locked on Mar 30 2016
Added on Feb 9 2016
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