[复制此代码]CODE:
create table bak as (select * from test group by title having count(*)=1);
insert into bak (select * from test group by title having count(*)>1);
truncate table test;
insert into test select * from bak;
本文来自: sunray's blog
详细参考: http://blog.prcer.com/show-1565-1.html
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