SQL话语:产品型号相同,数量累加,只显示第一条

 type , encapsulation, sale_date, brand, quantity --我想要的就是如果type相同的,把数量加起来,显示其中一条 --这样子报错: select distinct(type)as type ,min(encapsulation),min(sale_date),min(brand),quantity=sum(quantity) from long_goods group by type  --这样子数据显示又不对: select distinct(type)as type ,min(encapsulation),min(sale_date),min(brand),quantity=sum(quantity) from long_goods group by type 请各位指点一下 

select * from (select type,sum(quantity) quantity from long_goods group by type)aainner join(select * from long_goods a where not exists(select 1 from long_goods where type=a.type and sale_date<a.sale_date))bbon aa.type=bb.type
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SQL code
SELECT IDENTITY(int,1,1) as Row,       type ,       encapsulation,       sale_date,       brand,       quantityINTO #tmpFROM  long_goodsSELECT encapsulation,       sale_date,       brand,       TotalQ=(       SELECT SUM(quantity) FROM #tmp WHERE type=a.type       )FROM #t aWHERE NOT EXISTS     (      SELECT * FROM #tmp      WHERE type=a.type AND Row<a.Row     )DROP TABLE #tmp
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SQL code
;with cte as(select *,ROW_NUMBER() over(order by [type]) as px from long_goods ) select [type],encapsulation,brand,sale_date,quantity=(select sum(quantity) from cte where [type]=a.[type])from cte a  WHERE NOT EXISTS (SELECT nt