深入PHP

 方法一：利用3条SQL语句实现（采用临时数据表tmp进行转换）

                 create table tmp as select min(ID) as col1 from content group by name;
                 delete from content where id not in (select col1 from tmp);
                 drop table tmp;

               方法二：利用PHP程序实现，
                  
                  利用select * from content where ID in( select min(ID) as col1 from content group by name)找出不相同的记录，读取出来，再存入另一个数据表。