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<h2><a href="https://docs.jboss.org/author/display/TEIID/Set+Operations?focusedCommentId=82904661#comment-82904661">Set Operations</a></h2>
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<b>comment added</b> by <a href="https://docs.jboss.org/author/display/~tom9729">Tom Arnold</a>
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<p>The line about UNION/INTERSECT/EXCEPT with ALL seems a little redundant because the preceding line already explains how the output columns need to match, and the following line says that INTERSECT/EXCEPT with ALL is not supported.</p>
<p>Is there a reason that INTERSECT ALL and EXCEPT ALL are not supported? It seems like it would be simpler to ignore duplicates than to remove them.</p>
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