统计数据出现的次数
比如说 10条记录

1
2
3
2
5
2
3
8
9


2后面连续出3的了两次 ，那么 2-3 结果为 2/10
2-5 为1/10

[解决办法]

SQL code

declare @T table (id int)insert into @Tselect 1 union allselect 2 union allselect 3 union allselect 2 union allselect 5 union allselect 2 union allselect 3 union allselect 8 union allselect 9 union allselect 7select  '2' + '-' + ltrim(number) as c1 ,        ltrim(count(b.id)) + '/' + ltrim(( select   count(1)                                           from     @t                                         )) as c2from    master..spt_values c        left join ( select  row_number() over ( order by getdate() ) as rid ,                            *                    from    @t                  ) a on a.id = 2        left join ( select  row_number() over ( order by getdate() ) as rid ,                            *                    from    @t                  ) b on a.rid = b.rid - 1                         and b.id = c.numberwhere type = 'p' and number between 1 and 9 group by '2' + '-' + ltrim(number)/*c1             c2-------------- -------------------------2-1            0/102-2            0/102-3            2/102-4            0/102-5            1/102-6            0/102-7            0/102-8            0/102-9            0/10*/
[解决办法]
SQL code
declare @T table (id int)insert into @Tselect 1 union allselect 2 union allselect 3 union allselect 2 union allselect 5 union allselect 2 union allselect 3 union allselect 8 union allselect 9 union allselect 7--刚才是为了写成一句，所以嵌套了多次--SQL SERVER 2005;WITH M AS (select row_number() over (order by getdate()) as rid,* from @t)select '2-' + ltrim(number) as c1,ltrim(count(b.id)) + '/10' as c2from master..spt_values c left join M a on a.id = 2                           left join M b on a.rid = b.rid - 1 and b.id = c.numberwhere type = 'p' and number between 1 and 9 group by ltrim(number)/*c1             c2-------------- ---------------2-1            0/102-2            0/102-3            2/102-4            0/102-5            1/102-6            0/102-7            0/102-8            0/102-9            0/10*/
[解决办法]
SQL：
select count(1) 数量 ,数字 from 记录表  
where 标识列 >= ( select 标识列 from 记录表 where 数字=2 order by 标识列)
  group by 数字


后台：
返回DataTable dt
int count=0;
for(int i=1; i<=10 i++)
{
 for(int j=0 ; j<dt.Rows.Count;j++)
 {
   if(Convert.ToInt32(dt[j]["数字"])==i)
   {
      count=Convert.ToInt32(dt[j]["数量"]);
   ]
 }
 //2-i count/10
}