# Filter by entry has field set

**URL:** <https://discourse.jabref.org/t/filter-by-entry-has-field-set/1890>\
**Category:** Help\
**Created:** [January 21, 2020, 3:41pm UTC](https://discourse.jabref.org/t/filter-by-entry-has-field-set/1890 "2020-01-21T15:41:14Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![reox](https://yyz2.discourse-cdn.com/flex030/user_avatar/discourse.jabref.org/reox/32/2000_2.png) [@reox](https://discourse.jabref.org/u/reox)\
**Post date:** [January 21, 2020, 3:41pm UTC](https://discourse.jabref.org/t/filter-by-entry-has-field-set/1890/1 "2020-01-21T15:41:14Z")

</div>

I have two fields where I would like to match against especially: the first is the files field and the second the timestamp.  
So for example: is it possible to filter for all entries where a file exists and the timestamp field is set?  
I tried something like `timestamp != "" and file != ""` but this does not work