How to check if there is a duplicate of a blob in a database. I have documents table in the database, however I'm not sure how to check if one of them has a duplicate. I know you're supposed to use dbms_lob.compare function but after reading a few threads and articles on the topic I still do not understand this.How to check if there is a duplicate of a blob
阅读背景：
将BLOB与Oracle数据库中的其他BLOB进行比较
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