http://snipplr.com/language/plsql/tags/Asktom Recent snippets posted on Snipplr.com en-us Sat, 25 May 2013 17:01:32 GMT http://snipplr.com/view/8456/efficiently-compare-columns-from-two-tables/ This compares selected columns between 2 tables that you think might have differences. It lists the rows and values that are different between the two sources You can add WHERE clauses as appropriate. You could also use this to compare the results of two queries. This is from Tom Kyte (www.asktom.com). I can't say I understand exactly how it works, but it's much faster than other methods I've seen. It has the advantage of only looking through each table once.

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