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GROUP_CONCAT() function is used to concatenate **column** values into a single **string**.
GROUP_CONCAT() function is used to concatenate column values into a single string. - It is very useful if you would otherwise perform a lookup of many rows and then concatenate them via a programming language
- http://mahmudahsan.wordpress.com/2008/08/27/mysql-the-group_concat-function/
MySQL,GROUP_CONCAT
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