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Oracle sql question

Roberto Madro R.
Last Modified: 2021-04-21
I have a basic query that joins 2 tables (Oracle 9i), it runs fine and all, but I'm trying to fish out duplicate records, and when I resort to having count (column) > 1 the query runs but doesn't return any records.

Is it the fact that I'm joining 2 tables and having count works online on single-table data source, or is there something else at play here.

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