Question

我正在选择不同范围内的记录，例如

select t.range as profit_range, count(*) as number_ of_occurences   from (
  select case 
    when t.range between  100000000 and  200000000 then '100 million - 200 million'
    when t.range between  200000000 and  300000000 then '200 million - 300 million'
    .
    .
    .
    when t.range between  1000000000 and  2000000000 then '1000 million - 2000 million'
    else 'Greater then 2000 milions' end as range
  from tbl_profit) t
group by profit_range

这样可行，但结果行的顺序不正确

 Profit_Range                       No_of_occurences    
 100 million  - 200 million           4
 1000 million - 2000 million          1
 200 million  - 300 million           4

如何订购结果以正确的顺序显示？

Answer 1

select t.range as [profit range], count(*) as [number of occurences]
from (
  select case 
    when profit between  100000000 and  200000000 then '100 million - 200 million'
    when profit between  200000000 and  300000000 then '200 million - 300 million'
    .
    .
    .
    when profit between  1000000000 and  2000000000 then '1000 million - 2000 million'
    else 'Greater then 2000 milions' end as range
    from tbl_profit) t
group by t.range
Order by SUBSTR(t.range,1,LOCATE(‘million’,t.range)-1)

您可以使用SUBSTR()和LOCATE函数从范围中提取起始编号，并根据提取的编号对结果进行排序

如何在SQL中向序列查询添加序列号？

1 个答案: