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@dodopok
Created October 25, 2013 13:40
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Apaga registros duplicados no MySQL deixando o primeiro.
DELETE n1 FROM lancamento_contas n1, lancamento_contas n2 WHERE n1.id > n2.id AND n1.nroduplicata = n2.nroduplicata AND n1.group_id = n2.group_id
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