Sql 如何使用秩/连接以及在何处连接

我在代码中使用了多个内部联接，并提供了秩，但现在我想选择一个特定的秩。那么如何在where语句中使用rank呢

这是我的代码，但现在请帮助我继续：

select [YEAR],
       [IDManufacturer],
       sum([TotalPrice]), 
       rank() over (order by sum(totalprice) desc) as sales_rank
       from [dbo].[DIM_DATE] 
       join [dbo].[FACT_TRANSACTIONS] 
       on [dbo].[FACT_TRANSACTIONS].Date = [dbo].[DIM_DATE].DATE
       join [dbo].[DIM_MODEL] 
       on [dbo].[DIM_MODEL].IDModel=[dbo].[FACT_TRANSACTIONS].IDModel
       where [YEAR] in (2009,2010) 
       group by IDManufacturer,[year]
       order by sum([TotalPrice]) desc

---

现在我只想选择排名3和4。如何做到这一点？

如果您只想要排名3和4，请尝试以下方法：

   select * from (
   select [YEAR],
   [IDManufacturer],
   sum([TotalPrice]), 
   rank() over (order by sum(totalprice) desc) as sales_rank
   from [dbo].[DIM_DATE] 
   join [dbo].[FACT_TRANSACTIONS] 
   on [dbo].[FACT_TRANSACTIONS].Date = [dbo].[DIM_DATE].DATE
   join [dbo].[DIM_MODEL] 
   on [dbo].[DIM_MODEL].IDModel=[dbo].[FACT_TRANSACTIONS].IDModel
   where [YEAR] in (2009,2010) 
   group by IDManufacturer,[year]
   order by sum([TotalPrice]) desc
 ) t where sales_rank in (3,4)

---

您可以执行

子查询

或

CTE

，我建议您尝试使用两种方法，并查看执行计划选择哪种执行效果更好：

子查询

SELECT * FROM 
(select [YEAR],
       [IDManufacturer],
       sum([TotalPrice]) TotalPrice, 
       rank() over (order by sum(totalprice) desc) as sales_rank
from [dbo].[DIM_DATE] 
       join [dbo].[FACT_TRANSACTIONS] 
       on [dbo].[FACT_TRANSACTIONS].Date = [dbo].[DIM_DATE].DATE
       join [dbo].[DIM_MODEL] 
       on [dbo].[DIM_MODEL].IDModel=[dbo].[FACT_TRANSACTIONS].IDModel
where [YEAR] in (2009,2010) 
       group by IDManufacturer,[year]
) as SQ
Where sales_rank = 3 or sales_rank = 4
go 

通用表表达式

; with CTE as

(select [YEAR],
       [IDManufacturer],
       sum([TotalPrice]) TotalPrice, 
       rank() over (order by sum(totalprice) desc) as sales_rank
from [dbo].[DIM_DATE] 
       join [dbo].[FACT_TRANSACTIONS] 
       on [dbo].[FACT_TRANSACTIONS].Date = [dbo].[DIM_DATE].DATE
       join [dbo].[DIM_MODEL] 
       on [dbo].[DIM_MODEL].IDModel=[dbo].[FACT_TRANSACTIONS].IDModel
where [YEAR] in (2009,2010) 
       group by IDManufacturer,[year]
)

SELECT * FROM CTE WHERE sales_rank = 3 or sales_rank = 4

---

如果您只需要第3和第4个值，并且假设没有关联，则使用

offset/fetch

：

offset 2 rows fetch first 2 rows only

偏移量2

是因为偏移量从

0

开始计数，而不是从

1

开始计数