How can I detect rows with non-ASCII values?

Rocky Ji <[email protected]>
Newsgroups gmane.comp.db.sqlite.general
Message-ID <CAN2Gq-SN2Pnt4zHhvE4Vu5ztixD7sQuQ1_TQKgZm-RxjZpE2_Q@mail.gmail.com>
Hi,

I am asked to highlight rows containing strange characters. All data were
ingested by a proprietary crawler.

By strange, I mean, question marks, boxes, little Christmas Trees,  solid
arrows, etc. kind of symbols; these appear suddenly in flow of normal ASCII
English letters.

How do I approach this?

Thanks.
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