刪除舊

delete from a? using mix_crm_contact?? as a,mix_crm_contact? as b where a.id<b.id and a.`telphone_num` = b.`telphone_num`

刪除新

delete from a? using mix_crm_contact?? as a,mix_crm_contact? as b where a.id>b.id and a.`telphone_num` = b.`telphone_num`

轉(zhuǎn)載于:https://blog.51cto.com/xiaoxiaofeitu/762710

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