我怎样才能看到列中的数据来自哪里?

I don't know if anyone can help me. In my job, I inherited a completely undocumented database (Oracle 11). So far, I've managed to map most of the tables and determine what's going on where. However, there are a few columns that I haven't been able to decipher.I don't know if anyone can help me. In my job,