Hi rahulme81, please show us what you've tried so far. You've been asked to do this before. We prefer to help people with specific problems so they can learn as opposed to outright doing their work for them (which inevitably leads to future questions on the exact same topic).

You can peruse the regex quick intro, the tutorial or the documentation.

In reply to Re: Extracting datapart (YYYYMMDD) with filename regular expression by stevieb
in thread Extracting datapart (YYYYMMDD) with filename regular expression by rahulme81

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