Does someone know how to filter by character type (i.e if it contains numbers or not)?

[Anastasia Shere]

I need to make a query for all summaries that contain numbers bigger bigger than 99, basically three digit numbers, and another filter to exclude all tickets with any sort of numbers in their summaries, is that possible? 

[Andy Heinzer]

With Jira alone, this isn't something that JQL can do natively.  But, you could add a 3rd party plugin to Jira like Scriptrunner.  With this plugin you can gain access to some other functions such as using regex as a means to search specific fields for values.  With that you could then create a JQL search such as:

issueFunction in issueFieldMatch('',summary,'[0-9]{3}')

This in turn should return all issues that have three consecutive digits (such as 100, 555, etc) in the summary field.

And for the second query, you could create a regex that would return all summaries without any numbers in them, such as:

issueFunction in issueFieldMatch('',summary,'^([^0-9]*)$')

There is more on these functions in that plugin you can find in Scriptrunner's documentation: Script JQL Functions.