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Mysql 如果資料存在則更新,不存在插入新紀錄

一般都是使用
INSERT INTO
插入紀錄,不過如果有設KEY需要用更新的方式不然會出現錯誤
可以改用
REPLACE INTO
這樣存在的時候更新,不存在插入新紀錄
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