一些SQL語句和關鍵字（一）

as關鍵字的做用 as這個關鍵字的做用的給字段起個別名sql select * from user select username as 帳號 , password as 密碼, mingzi as 名字, zhengjianhao as 證件號, dianhua as 電話, zhuceriqi as 註冊日期, zhuangtai

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