Use posts_groupby filter with part of string in wp_query?

Question

I am using posts_groupby filter to group by a custom field my wordpress posts. Is there any way using wp_query and posts_groupby to group my posts using part of a string of the custom field?

Any help appreciated.

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, stefanosn 3 years 2019-11-25T17:10:47-05:00 0 Answers 79 views 0

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