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                ## concat_ws,concat ### 說明 | 函數 | 說明 | | --- | --- | | replace(s,s1,s2) | 將字符串s中的s1替換為s2 | | insert(s1,x,len,s2) | 將 s1中 的 x 位置開始長度為 len 的字符串替換為s2 | ### 例子:查詢寶寶月齡 ```sql SELECT id, baby_name, baby_sex, replace(replace(baby_sex, 0, '女'),1,'男') AS baby_sex_format, insert('男女',baby_sex+1,1,'') as baby_sex_format1 FROM baby; ``` ### 例子:將疫苗告知書中的英文句號修改為中文句號 ```sql UPDATE vaccine SET vaccine_notification = replace(vaccine_notification,'.','。'); ```
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