sql server 按照區間進行分組的兩種語法

一、按照區間進行分組

select CASE  
    WHEN a.Commission>0 and a.Commission<10 THEN
        '[0-10]'
        WHEN a.Commission>10 and a.Commission<20 THEN
        '[10-20]'
        WHEN a.Commission>20 and a.Commission<30 THEN
        '[20-30]'
        WHEN a.Commission>30 and a.Commission<50 THEN
        '[30-50]'
    ELSE
        '[50]'
END  as 'Price',sum(a.ClickNum) ClickNum,count(b.productId) AskNum,sum(if(OrderState=11,1,0)) FinishNum,Round(sum(if(OrderState=11,1,0))/if(count(b.productId)=0,1,count(b.productId)),2)*100 TestFinishNum,Round(sum(if(ConmmentSate=2,1,0))/if(count(b.productId)=0,1,count(b.productId)),2)*100 CommentChance  from fksd_product a left join fksd_commentorder b on a.Id=b.ProductId where a.IsDelete!=10 
GROUP BY CASE  
    WHEN a.Commission>0 and a.Commission<10 THEN
        '[0-10]'
        WHEN a.Commission>10 and a.Commission<20 THEN
        '[10-20]'
        WHEN a.Commission>20 and a.Commission<30 THEN
        '[20-30]'
        WHEN a.Commission>30 and a.Commission<50 THEN
        '[30-50]'
    ELSE
        '[50]'
END ;

    二、第二種比較蠢的方式，具體實現如下：

 select 0-3" f1,cnt 數量 from (
select count(*) cnt from 表 where 字段>=0 and 字段<=3 
) a
union all
 select "4-6" f1,cnt 數量 from (
select count(*) cnt from 表 where 字段>=4 and 字段<=6
)b
union all
 select "7-10" f1,cnt 數量 from (
select count(*) cnt from 表 where 字段>=7 and 字段<=10 
) c