将 SQL Server 2012 CTE 转换为 SQL Server 2008

Question

我有以下查询，它在 2012 年运行良好，因为它使用的是 2012 年的功能。任何人都可以在 2008 年使用相同的输出进行完全相同的查询吗？我正在寻找从 Filler table 到 Bucket table 的 Bucket 填充数据。我在 SQL 2008 中执行时出错。The Parallel Data Warehouse (PDW) features are not enabled

declare @Buckets table (ID char(2), FullCapacity int)
declare @Filler table (ID char(2), Filler int)

insert into @Buckets values
('B1', 100),
('B2', 50),
('B3', 70)

insert into @Filler values
('F1', 90),
('F2', 70),
('F3', 40),
('F4', 20)

;with fillerCte as
(
select 
ID,
Filler,
sum(Filler) over (order by ID) as TotalFill
from @Filler
), 
BucketCte as
(
select 
ID,
FullCapacity,
sum(FullCapacity) over (order by ID) - FullCapacity as RunningTotalCapacity
from @Buckets
)
select 
b.ID, 
b.FullCapacity,
case 
when f.TotalFill < b.RunningTotalCapacity then 0
when f.TotalFill > b.RunningTotalCapacity + b.FullCapacity then b.FullCapacity
else f.TotalFill - b.RunningTotalCapacity
end as CurrentAmount
from fillerCte as f
cross join BucketCte as b
order by f.ID, b.ID

输出 table 应该在下面显示填充过程。

ID | FullCapacity | CurrentAmount       
---+--------------+--------------
B1 |    100       |    90        
B2 |     50       |     0    
B3 |     70       |     0
---+--------------+--------------
B1 |    100       |   100        
B2 |     50       |    50
B3 |     70       |    10
---+--------------+--------------
B1 |    100       |   100      
B2 |     50       |    50    
B3 |     70       |    50
---+--------------+--------------
B1 |    100       |   100        
B2 |     50       |    50    
B3 |     70       |    70

Answer 1

要在 SQL Server 2008 中执行相同的查询，您必须分两步计算运行总数，第一步是使用 ROW_NUMBER() OVER(ORDER BY ID) 对行进行排名，然后使用行号计算运行总数：

;WITH fillerCte as
(
  SELECT 
   ID,
   Filler,
   ROW_NUMBER() OVER(ORDER BY Id) AS RN
   FROM @Filler
), FillerRT
AS
(
  SELECT 
    f1.ID,
    f1.Filler,
    SUM(f2.Filler) AS TotalFill
  FROM fillerCte AS f1
  INNER JOIN fillerCte AS f2 ON f2.rn <= f1.rn
  GROUP BY f1.ID, f1.Filler
), BucketCte as
(
  SELECT
    ID,
    FullCapacity,
    ROW_NUMBER() OVER(ORDER BY ID) AS RN
  FROM @Buckets
),BucketRN
AS
(
  SELECT 
    b1.ID,
    b1.FullCapacity,
    SUM(b2.FullCapacity) - b1.FullCapacity AS RunningTotalCapacity
  FROM BucketCte AS b1 INNER JOIN BucketCte AS b2 ON b2.RN <= b1.RN
  GROUP BY b1.ID, b1.FullCapacity
)
select 
b.ID, 
b.FullCapacity,
case 
when f.TotalFill < b.RunningTotalCapacity then 0
when f.TotalFill > b.RunningTotalCapacity + b.FullCapacity then b.FullCapacity
else f.TotalFill - b.RunningTotalCapacity
end as CurrentAmount
from FillerRT as f
cross join BucketRN as b
order by f.ID, b.ID;

这将为您提供与查询完全相同的输出。

将 SQL Server 2012 CTE 转换为 SQL Server 2008

Convert SQL Server 2012 CTE to SQL Server 2008

sql

common-table-expression

sql-server-2008

sql-server-2012