将动态数据透视结果获取到临时 table SQL 服务器

Question

我想将动态数据透视结果保存到临时 table 中，然后我可以使用 select 查询将其发送回 C# 代码。

DECLARE @partymasterid bigint = 2;
DECLARE @cols AS NVARCHAR(MAX);
DECLARE @query  AS NVARCHAR(MAX);

SELECT 
    @cols = STUFF((SELECT DISTINCT '[' + CAST(dbo.InventoryProductMaster.Name AS nvarchar(max)) + '],' 
                   FROM dbo.InventoryBiltyMaster 
                   INNER JOIN dbo.InventoryPartyProductPriceMaster ON dbo.InventoryBiltyMaster.InventoryPartyProductPriceMasterID = dbo.InventoryPartyProductPriceMaster.ID 
                   INNER JOIN dbo.InventoryProductMaster ON dbo.InventoryPartyProductPriceMaster.InventoryProductMasterID = dbo.InventoryProductMaster.ID 
                   WHERE dbo.InventoryBiltyMaster.PartyMasterID = @partymasterid 
                   FOR XML PATH(''), TYPE).value('.', 'NVARCHAR(MAX)'), 1, 0, '');

SELECT @query = 
'
SELECT
*
FROM 
(SELECT
Count(dbo.InventoryBiltyMaster.ID) AS BiltyCount,
--dbo.InventoryBiltyMaster.InventoryProductMasterID,
--dbo.InventoryBiltyMaster.VehicleMasterID,
dbo.InventoryProductMaster.Name,
dbo.VehicleMaster.VehicleNumber

FROM
dbo.InventoryBiltyMaster
INNER JOIN dbo.InventoryPartyProductPriceMaster ON dbo.InventoryBiltyMaster.InventoryPartyProductPriceMasterID = dbo.InventoryPartyProductPriceMaster.ID
INNER JOIN dbo.InventoryProductMaster ON dbo.InventoryPartyProductPriceMaster.InventoryProductMasterID = dbo.InventoryProductMaster.ID
INNER JOIN dbo.VehicleMaster ON dbo.InventoryBiltyMaster.VehicleMasterID = dbo.VehicleMaster.ID
WHERE
dbo.InventoryBiltyMaster.PartyMasterID = ' + CAST(@partymasterid as nvarchar(50)) + '
GROUP BY
dbo.InventoryBiltyMaster.InventoryProductMasterID,
dbo.InventoryProductMaster.Name,
dbo.InventoryBiltyMaster.VehicleMasterID,
dbo.VehicleMaster.VehicleNumber
)
AS S
PIVOT
(
    MAX(BiltyCount)
    FOR [Name] IN (' + LEFT(@cols, LEN(@cols)-1) + ')
)AS pvt';

EXEC SP_EXECUTESQL @query

这里的结果可能有 3 列或 5 列或 10-15 列。这取决于查询的结果。这个结果我想在 temp table 上使用更多这个数据。我想在存储过程中使用它来将结果发送回 ASP.NET MVC 5 和 Entity Framework

Answer 1

使用 sp_executesql 时，如果不在父作用域中定义它，则不能将其存储在 #（临时 table）中。在您的情况下，您有一个动态 pivot 并且您不知道那里会有什么列和多少列。

sp_executesql 在不同的会话中运行（sp_executesql 创建自己的会话）并且临时 tables 是特定于会话的。

对于您的方案，您可以使用 ##（全局温度 table）。您可以像下面这样更改您的查询。

SELECT @query = 
'
SELECT
* into ##temp
FROM 
(SELECT
Count(dbo.InventoryBiltyMaster.ID) AS BiltyCount,
--dbo.InventoryBiltyMaster.InventoryProductMasterID,
--dbo.InventoryBiltyMaster.VehicleMasterID,
dbo.InventoryProductMaster.Name,
dbo.VehicleMaster.VehicleNumber

FROM
dbo.InventoryBiltyMaster
INNER JOIN dbo.InventoryPartyProductPriceMaster ON dbo.InventoryBiltyMaster.InventoryPartyProductPriceMasterID = dbo.InventoryPartyProductPriceMaster.ID
INNER JOIN dbo.InventoryProductMaster ON dbo.InventoryPartyProductPriceMaster.InventoryProductMasterID = dbo.InventoryProductMaster.ID
INNER JOIN dbo.VehicleMaster ON dbo.InventoryBiltyMaster.VehicleMasterID = dbo.VehicleMaster.ID
WHERE
dbo.InventoryBiltyMaster.PartyMasterID = ' + CAST(@partymasterid as nvarchar(50)) + '
GROUP BY
dbo.InventoryBiltyMaster.InventoryProductMasterID,
dbo.InventoryProductMaster.Name,
dbo.InventoryBiltyMaster.VehicleMasterID,
dbo.VehicleMaster.VehicleNumber
)
AS S
PIVOT
(
    MAX(BiltyCount)
    FOR [Name] IN (' + LEFT(@cols, LEN(@cols)-1) + ')
)AS pvt';

EXEC SP_EXECUTESQL @query
--now you can use ##temp

注意：使用全局临时table可能会导致不可预测的table行为，如果它从多个会话中更新，你可能会考虑给出一个每个会话的唯一名称。

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