主题：LoadFilter加载不重复值

delete a from 表A as a inner join (select 列1,列2,列3,count(name)  as cnt from 表A group by 列1,列2,列3 ) as b on a.列1=b.列1 and a.列2=b.列2 and a.列3=b.列3 where b.cnt  > 1