sql求和有关问题_Java Web开发

sql求和问题
现在我要统计表里的三列的记录的条数，并将各列的记录的条数求和，请问语句怎么写
比如列名：uni、mob、tel，表名：send

------解决方案--------------------------------------------------------
select tab.cuid+tab.cmod+tab.ctel from
(select
(select count(*) from send where uid is not null) as cuid,
(select count(*) from send where uid is not null) as cmod,
(select count(*) from send where uid is not null) as ctel
from dual)
tab where 1=1

LZ这表有点高级哦
------解决方案--------------------------------------------------------

SQL code

select ((select count(uni) from send where uni is not null)       + (select count(mob) from send where mob is not null)       + (select count(tel) from send where tel is not null)) as totalfrom dual
------解决方案--------------------------------------------------------
create table a (
  aa number(10),
  bb number(10),
  cc number(10)
)

insert into a values(1,1,0);
insert into a values(1,0,1);
insert into a values(1,0,0);

select sum(aa)+sum(bb)+sum(cc) from a;