SQL Server Forums | SQLServerCentral.com / Discuss Content Posted by Gregory Larsen / Article Discussions / Article Discussions by Author / Level 5: The Mathematics of SQL: Part 2 / Latest PostsInstantForum.NET v2.9.0SQL Server Forums | SQLServerCentral.comhttp://www.sqlservercentral.com/Forums/notifications@sqlservercentral.comFri, 25 Apr 2014 02:41:32 GMT20RE: Level 5: The Mathematics of SQL: Part 2http://www.sqlservercentral.com/Forums/Topic1170048-90-1.aspxThanks GregoryIt's always useful to review the basics.I think a mathematical set regards any identical member as being the same thing, so in the diagrams there would only be one representative of any number.I don't know where that leaves us with UNION ALL though, it seems to break the rules.I'm happy to be corrected, I just scraped through my maths degree.CraigWed, 30 Nov 2011 03:21:46 GMTCraig Thomson-419971RE: Level 5: The Mathematics of SQL: Part 2http://www.sqlservercentral.com/Forums/Topic1170048-90-1.aspx"as shown in the Venn diagram in Figure 5" should this be Figure 3?"INNER JOIN operation to return part 2 of Figure 6" should this be Figure 4?Mon, 21 Nov 2011 01:04:25 GMTFiacre LenehanRE: Level 5: The Mathematics of SQL: Part 2http://www.sqlservercentral.com/Forums/Topic1170048-90-1.aspxI reviewed the article text and your comment and I'm not following what part of the article has incorrect figure numbers. Would you please explain a little further so I can get the article corrected so it contains references to figures that a accurate.Thank youGregFri, 18 Nov 2011 10:15:22 GMTGreg LarsenRE: Level 5: The Mathematics of SQL: Part 2http://www.sqlservercentral.com/Forums/Topic1170048-90-1.aspxA very clear and informative article. A minor point is that the Figure numbers appear to be incorrect in the INNER Join Operator and OUTER JOIN Operator sectionsWed, 16 Nov 2011 01:35:36 GMTFiacre LenehanLevel 5: The Mathematics of SQL: Part 2http://www.sqlservercentral.com/Forums/Topic1170048-90-1.aspxComments posted to this topic are about the item [B]<A HREF="/articles/Stairway+Series/75777/">Level 5: The Mathematics of SQL: Part 2</A>[/B]Mon, 05 Sep 2011 11:22:22 GMTGreg Larsen