--重复数据只显示一条 select min(a) a, b, c from test_tb group by b, c; --删除重复数据 delete from tb where rowid not in (select min(rowid) from test_tb group by b, c); group by 查询列只能用聚集函数或被group by的字段
日期:2014-05-16 浏览次数:20457 次
--重复数据只显示一条 select min(a) a, b, c from test_tb group by b, c; --删除重复数据 delete from tb where rowid not in (select min(rowid) from test_tb group by b, c); group by 查询列只能用聚集函数或被group by的字段