Hi Ed,
Ed Curtis wrote:
I need to get some duplicate record information from a table and I
haven't found any way to do it yet. I figured there might be some type
of query I could do using a "for each" type command.
What I have is a table with names and companies. Some people have
multiple entries for different companies. What I need to get is the name
that has multiple entries along with the company names.
Name | Company
------------------------
Joe Blow Company 1
Joe Blow Company 2
Joe G. Blow Company 1
Running the query should only return Joe Blow with Company 1 and Company 2.
I can find out how many records Joe Blow has or list out each Company
record grouped by Name but I only want Names with multiple entries
shown. Can anyone help? I'm sure this also makes a difference but I'm
stuck using MySQL 3.23.
Since you are using 3.23, you can't use subqueries, which would otherwise make this
easy (http://www.xaprb.com/blog/2006/10/09/how-to-find-duplicate-rows-with-sql/). But
you can do it with temporary tables instead:
CREATE TEMPORARY TABLE tmp AS SELECT Name, COUNT(*) AS cnt FROM tbl GROUP BY
Name;
SELECT tbl.* FROM tbl JOIN tmp USING(Name) WHERE cnt > 1;
Baron
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