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Mysql去除重复值列，只保留一条_MySQL

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2016-06-01 13:32:041048browse

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Mysql去除重复值列，只保留一条

 

1DELETE2FROM3      software USING (software,(SELECT DISTINCT min(id) AS id, ident FROM software GROUP BY ident HAVING count(1) > 1) AS t2)4WHERE5      software.ident = t2.ident6AND software.id > t2.id;

 


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