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MySQL: ON DUPLICATE KEY UPDATE 用法 避免重复插入数据_MySQL

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2016-06-01 13:31:20993browse

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INSERT INTO osc_visit_stats(stat_date,type,id,view_count) VALUES (?,?,?,?) ON DUPLICATEKEY UPDATE view_count=view_count+?INSERT INTO osc_space_visit_records(space,user,visit_count,ip,visit_time) VALUES(?,?,?,?,?) ON DUPLICATE KEY UPDATE visit_count=visit_count+1,ip=?,visit_time=NOW()

使用该语法可在插入记录的时候先判断记录是否存在，如果不存在则插入，否则更新，很方便，无需执行两条SQL

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