Question

我正在修改查询以在其中包含分页和rownum计数，但是不知何故rownum导致错误

列名模糊

代码：

WITH List AS
(
    SELECT 
        ROW_NUMBER() OVER (ORDER BY error_type asc) AS rowNum,
        MAX(id) AS id, 
        COUNT(errorid) AS ecount,
        MAX(errorid) AS errorid,
        FORMAT(MAX(datein), 'MMMM d, yyyy h:mm:ss tt PST', 'en-US') AS max_datein,
        template,
        line,
        error_message, 
        UPPER(error_type) AS error_type 
    FROM
        mytable mt
    GROUP BY
        errorid,
        template, 
        line,
        error_message,
        error_type 
),
ListRecordCount AS
(
    SELECT 
        *
    FROM 
        List,
        (
            SELECT 
                MAX(rowNum) AS TotalrecordCount
            FROM List
        ) AS TotalrecordCount
) 
SELECT *
FROM 
    ListRecordCount 
    INNER JOIN List mi ON mt.id = mi.id
WHERE rowNum BETWEEN 1 and 5000
ORDER BY mi.max_datein

我得到的错误是：

[42000] [Microsoft] [SQL Server Native Client 11.0] [SQL Server]无法绑定多部分标识符“ mt.id”。（4104）
  [42000] [Microsoft] [SQL Server Native Client 11.0] [SQL Server]模棱两可的列名“ rowNum”。（209）
  [42000] [Microsoft] [SQL Server Native Client 11.0] [SQL Server]模棱两可的列名“ rowNum”。（209）

Answer 1

因为首先在List表中指定rowNum，然后从List中选择*以创建ListRecordCount表，该表在此还包括rowNum列。因此，如果将ListRecordCount与List结合使用，则两个表中都将具有rowNum，这将导致模棱两可。

同样从上面的查询中，我看不到您将这两个表联接的原因。

我相信这个查询就是您想要的。

WITH List AS(
    SELECT 
        row_number() over(ORDER BY error_type asc) AS rowNum
        , max(id) as id, count(errorid) as ecount
        , max(errorid) as errorid, FORMAT(max(datein), 'MMMM d, yyyy h:mm:ss tt PST', 'en-US') as max_datein
        , template,line,error_message, upper(error_type) AS error_type 
    from mytable mt
    group by errorid, template,line,error_message,error_type 
),
ListRecordCount AS(
    SELECT 
        *
        , (SELECT MAX(rowNum) AS TotalrecordCount FROM List) AS TotalrecordCount
    FROM List
)
SELECT *
FROM ListRecordCount 
WHERE rowNum BETWEEN 1 and 5000
order by max_datein

Answer 2

您在两个表中都指定了row_num。也许您打算这样做：

    select . . .
    from ListRecordCount lrc join
         List mi 
         on mt.id = mi.id 
    where lrc.rowNum between 1 and 5000

或：

    select . . .
    from ListRecordCount lrc join
         List mi 
         on mt.id = mi.id 
    where mi.rowNum between 1 and 5000

或者，如果您想要基于结果集的行号：

select *
from (select . . ., row_number() over (order by ?) as seqnum
      from ListRecordCount lrc join
           List mi 
           on mt.id = mi.id 
     ) mil
where seqnum between 1 and 5000

Answer 3

该错误涉及您的主要SELECT子句：

SELECT *
FROM 
    ListRecordCount 
    INNER JOIN List mi ON mt.id = mi.id
WHERE rowNum BETWEEN 1 and 5000
                  ^^

问题出在以下事实：公用表表达式ListRecordCount和List都有一个名为rowNum的列（稍后会详细介绍）。

要解决此问题，您只需在主查询中添加前缀列rowNum。它必须是mt.rowNum或mi.rowNum，例如：

...
SELECT 
    *
FROM 
    ListRecordCount mt
    INNER JOIN List mi ON mt.id = mi.id
WHERE mt.rowNum BETWEEN 1 and 5000
ORDER BY mi.max_datein

Nb：您似乎缺少了mt上ListRecordCount别名的声明，我添加了它。

详细信息

List定义了rowNum列：

WITH List AS
(
    SELECT 
        ROW_NUMBER() OVER (ORDER BY error_type asc) AS rowNum,
    ...

ListItems在SELECT *上进行了List，因此它也有列rowNum：

...
ListRecordCount AS
(
    SELECT 
        *
    FROM 
        List,
    ...

在表

3 个答案: