http://www.stillnetstudios.com/union-queries-automatically-filter-duplicates/ Web development notes and commentary from Ryan Stille Fri, 30 Jul 2010 20:41:32 +0000 http://wordpress.org/?v=2.9.2 hourly 1 http://www.stillnetstudios.com/union-queries-automatically-filter-duplicates/comment-page-1/#comment-201 Aaron Greenblatt Thu, 19 Apr 2007 21:32:47 +0000 http://www.stillnetstudios.com/2007/03/26/union-queries-automatically-filter-duplicates/#comment-201 Knowing this, how would I see only records that have a duplicate entry. I need to return only one column since I will be using the result set in a subquery so I will be using UNION ALL, and I want to see which records turn up two or more times. Knowing this, how would I see only records that have a duplicate entry. I need to return only one column since I will be using the result set in a subquery so I will be using UNION ALL, and I want to see which records turn up two or more times.

]]> http://www.stillnetstudios.com/union-queries-automatically-filter-duplicates/comment-page-1/#comment-200 dc Tue, 27 Mar 2007 11:38:18 +0000 http://www.stillnetstudios.com/2007/03/26/union-queries-automatically-filter-duplicates/#comment-200 MINUS and INTERSECT are pretty good tools to have in your box too, they are from the same family as UNION and UNION ALL. Worth reading up on. (Oracle has them and I think MSSQL from 2005). MINUS and INTERSECT are pretty good tools to have in your box too, they are from the same family as UNION and UNION ALL. Worth reading up on. (Oracle has them and I think MSSQL from 2005).

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