Mysql 操做平常記錄

一、刪除多餘的空記錄 delete from table where column1 is null and colunm2 is null; 二、group by函數的排序問題（求和與排序） select sum(bian_page) bian_page,sum(shen_page) shen_page,sum(jiao_page) jiao_page ,name,xueduan,xueke,s

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