Question

我正在使用pivot编写一个sql查询，我收到以下错误：

Msg 156, Level 15, State 1, Line 14
Incorrect syntax near the keyword 'select'.
Msg 102, Level 15, State 1, Line 14
Incorrect syntax near ')'.

我写的查询是：

select * 
from (
        select a.ID as id,
            a.dataValue as value
        from dbo.TableA a (nolock)
        where a.ID in (select b.ID from dbo.TableB b(nolock))
            and a.someOtherId = '4000'
            and a.DT = '2/16/2011 12:00:00'
    )as data
    pivot
    (
        sum([value])
        for [id] in (select ID from dbo.TableB (nolock))
    ) as pvt

任何人都可以帮我解决这个问题吗？提前致谢。

Answer 1

根据Microsoft的文档，您无法在select之后使用in：您必须手动列出值。

[<column that contains the values that will become column headers>]
    IN ( [first pivoted column], [second pivoted column],
    ... [last pivoted column])
) AS <alias for the pivot table>

假设select b.ID from dbo.TableB b(nolock)返回1，2，3，您可以像这样重写代码：

select * 
from (
    select a.ID as id,
        a.dataValue as value
    from dbo.TableA a (nolock)
    where a.ID in (1,2,3)
        and a.someOtherId = '4000'
        and a.DT = '2/16/2011 12:00:00'
)as data
pivot
(
    sum([value])
    for [id] in ([1],[2],[3])
) as pvt

Answer 2

您无法动态构建for in子句中的字段列表。

 for [id] in (select ID from dbo.TableB (nolock))

这是不允许的。您必须明确列出列名称（抱歉）

更改：从dbo.TableB中选择ID 收件人：（Field1，field2，Field3） - 要返回的字段的实际名称

Example:

-- Pivot table with one row and five columns
SELECT 'AverageCost' AS Cost_Sorted_By_Production_Days, 
[0], [1], [2], [3], [4]
FROM
(SELECT DaysToManufacture, StandardCost 
    FROM Production.Product) AS SourceTable
PIVOT
(
AVG(StandardCost)
FOR DaysToManufacture IN ([0], [1], [2], [3], [4])
) AS PivotTable;

这个使用pivot的sql查询有什么问题

2 个答案: