select a.* from table1 a join(
select tel=min(tel),USER_NAME from table1 group by USER_NAME
)b on a.USER_NAME=b.USER_NAME and a.tel=b.tel
select tel=min(tel),USER_NAME from table1 group by USER_NAME
)b on a.USER_NAME=b.USER_NAME and a.tel=b.tel
select a.*
from table1 a join
( select user_name, min(tel) as tel
from table1
group by user_name
) b
on a.tel=b.tel and a.user_name=b.user_name