求求:合并sql查询语句
select   top   5   *   from   news   where   newstype=1 
 select   top   5   *   from   news   where   newstype=2 
 select   top   5   *   from   news   where   newstype=3 
 select   top   5   *   from   news   where   newstype=4   
 这四条语句,怎么用一条sql语句来写!     
------解决方案--------------------select top 5 * from news where newstype=1
union all 
select top 5 * from news where newstype=2
union all 
select top 5 * from news where newstype=3
...........