怎样对union all结果统计?该怎么解决

怎样对union all结果统计??
(表1)   union   all   (表二)

怎么对得到的结果统计,count()   怎么使用?

------解决方案--------------------
select count(*) from (select .... union all select ...) t
------解决方案--------------------
Select Count(*) From
(
Select * From 表1
Union All
Select * From 表二) A
------解决方案--------------------
select count(*) from (select * from 表1 union all select * from 表2) t