Question

我已经计算了一张表的TOP 10运行总和，现在想以百分比的形式获取此pareto图，我有以下代码：

WITH
CTE as
(
    SELECT 
       [nWordNr] as W, 
       [nBitNr] as B,
       SUM([tmTotals]) as total,
       COUNT(*) as Amount
    FROM Messages_History
    GROUP BY nWordNr, nBitNr
),
totAlarms as
(
    select 
    count([nWordNr]) as cnt
    FROM Messages_History
)
SELECT TOP 10 *, 
    SUM(total) OVER (ORDER BY total desc) * 1.0 / totAlarms.cnt as Running
FROM   CTE
ORDER BY total desc

当我想使用totAlarms.cnt计算运行百分比时，出现以下错误：

The multi-part identifier "totAlarms.cnt" could not be bound.

如何使用totAlarms.cnt计算运行百分比。

Answer 1

WITH
CTE as
(
SELECT 
     [nWordNr] as W, 
     [nBitNr] as B,
     SUM([tmTotals]) as total,
     COUNT(*) as Amount
FROM Messages_History
GROUP BY nWordNr, nBitNr
),
  totAlarms as
  (
  select 
  count([nWordNr]) as cnt
  FROM Messages_History
  )
SELECT TOP 10 *, 
   SUM(total) OVER (ORDER BY total desc) * 1.0 / totAlarms.cnt as Running
FROM   CTE,totAlarms 
ORDER BY total desc

借助交叉联接，您可以实现它。不能绑定多部分标识符“ totAlarms.cnt”。此错误表明您在联接或从中不使用totAlarms（CTE表）。

Answer 2

CTE不会自动包含在附加查询中，您必须在FROM或JOIN子句中提及它们。

您当前的查询格式为：

WITH
   CTE AS ( ... ),
   totAlarms  AS ( ... )
SELECT ...
FROM CTE
ORDER BY ...

因此，CTE子句中仅可见SELECT。 totAlarms已定义但从未使用过-就像创建VIEW一样，但不编写任何引用它的查询。

由于您的两个CTE是独立的，因此您需要CROSS JOIN，并使用以下格式：

WITH
   CTE AS ( ... ),
   totAlarms  AS ( ... )
SELECT ...
FROM CTE
CROSS JOIN totAlarms
ORDER BY ...

或使用,运算符，该运算符实际上是交叉联接：

WITH
   CTE AS ( ... ),
   totAlarms  AS ( ... )
SELECT ...
FROM CTE, totAlarms
ORDER BY ...

Answer 3

由于计数只是一个值，因此将其捕获在标量变量中：

DECLARE @totAlarms_cnt INT = (
                                  SELECT    COUNT([nWordNr]) as cnt
                                  FROM      Messages_History
                                  )
;
WITH
CTE as
(
SELECT 
     [nWordNr] as W, 
     [nBitNr] as B,
     SUM([tmTotals]) as total,
     COUNT(*) as Amount
FROM Messages_History
GROUP BY nWordNr, nBitNr
)

SELECT TOP 10 *, 
   SUM(total) OVER (ORDER BY total desc) * 1.0 / @totAlarms_cnt as Running
FROM   CTE
ORDER BY total desc

Answer 4

与其编写sub CTE尝试创建变量和存储值并像下面那样使用

，

declare  @nWordNr int
select @nWordNr=count(nWordNr)  FROM Messages_History

;WITH
CTE as
(
SELECT 
[nWordNr] as W, 
[nBitNr] as B,
SUM([tmTotals]) as total,
COUNT(*) as Amount
FROM Messages_History
GROUP BY nWordNr, nBitNr
)--,
--totAlarms as
--(
--select 
--count([nWordNr]) as cnt
--FROM Messages_History
--)
SELECT TOP 10 *, 
SUM(total) OVER (ORDER BY total desc) * 1.0 / @nWordNr as Running
FROM   CTE
ORDER BY total desc

多部分标识符无法与WITH子句绑定

4 个答案: