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Total_Sales 񡜧
NAME      SALES
---------- -----
Greg          50
Sophia        40
Jeff          20
Stella        20
Jennifer      15
John          10

ÒªÇóÀÛ»ý°Ù·Ö±È sql :
select  a1.name ,a1.sales,sum(a2.sales)/(select sum(sales) from Total_Sales )
from Total_Sales a1,total_sales a2 where a1.sales < a2.sales or (a1.sales = a2.sales and a1.name <= a2.name)
group by a1.name,a1.sales order by a1.sales desc ,a1.name desc;
½á¹û£º
NAME      SALES SUM(A2.SALES)/(SELECTSUM(SALES
---------- ----- ------------------------------
Greg          50              0.32258064516129
Sophia        40              0.580645161290323
Stella        20              0.709677419354839
Jeff          20              0.838709677419355
Jennifer      15              0.935483870967742
John          10                      &nb


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