I'm unable yet to locate a particular "Item owner: sitecore\smith" value I see well-and-alive in Content Editor "Quick Info" of an item, but not in the SQL Server backend tables.
I often pull a convenient SELECT query over the:
tables, but this particular field VALUE doesn't seem to live there. I went to other tables like History, but still didn't find it there either.
To be noted is that it's a content that is created from an importing agent automation from a CSV file. So the __owner "sitecore\smith" is from the developer under which the import agent executes, rather that the real Sitecore end-user. But does it really matter as to simply find where this value "sitecore\smith" lives in the backend tables..