Question

我正在使用以下SQL查询3个简单表并撤回结果。当我在SQL Server 2005 EM（正在使用的数据库）中运行此查询时，将返回正确的记录集结果。当我通过SQL语句或存储过程从我的网页（ASP）执行此操作时，我得到一些列的空白值。另外，我注意到当我更改在FROM子句中选择的表的顺序时，之前的一些列会返回空值。我的SQL有什么问题，因为它在调用时无法工作吗？我在本地开发了我的应用程序，它工作正常。当我将它部署到客户端的网络时，问题就开始了......客户端正在运行Win 2000 SP4作为他们的应用程序服务器，我的应用程序是在带有SQL Server 2005数据存储的ASP 3.0中开发的。

SELECT
Scorecard_Measure.Measure,
Scorecard_Measure.Target,
Scorecard_Measure.YTD,
Scorecard_Measure.Status,
Scorecard_Measure.Explanation,
Scorecard_Measure.Division,
Scorecard_Measure.ZIndex,
Scorecard_Measure.LastUpdated,
Scorecard_Measure.ID,
Scorecard_Objectives.Details,
Scorecard_Objectives.ZIndex,
Scorecard_ObjectiveCats.IdentityLetter
FROM
[Scorecard_Measure],
[Scorecard_Objectives],
[Scorecard_ObjectiveCats]
WHERE
Scorecard_Measure.ObjID=Scorecard_Objectives.ID
AND Scorecard_Objectives.ObjCatID = Scorecard_ObjectiveCats.ID
AND Scorecard_Measure.FiscalYear = '2011'
AND Scorecard_Measure.Publish='Y'
ORDER BY Scorecard_Measure.LastUpdated DESC

Scorecard_Objectives.ID是Scorecard_Measure表中的外键，Scorecard_ObjectiveCats.ID是Scorecard_Objectives表中的外键。

此外，一个奇怪的发生。我有两个相同的列名，当我引用这些列时，服务器没有像我之前所说的那样抛出一个错误，说“你的结果具有相同名称的列，使用它们来自的表引用它们” ......例如rs（“Scorecard_Objectives.ZIndex”）和rs（“Scorecard_Measure.ZIndex”） - 当我使用这些引用时，我从IIS收到错误。

赞赏任何观点。提前谢谢！

Answer 1

使用不同的变量访问两个ZINDEX。试试这个连接查询。

SELECT
Scorecard_Measure.Measure,
Scorecard_Measure.Target,
Scorecard_Measure.YTD,
Scorecard_Measure.Status,
Scorecard_Measure.Explanation,
Scorecard_Measure.Division,
Scorecard_Measure.ZIndex as MZIndex,
Scorecard_Measure.LastUpdated,
Scorecard_Measure.ID,
Scorecard_Objectives.Details,
Scorecard_Objectives.ZIndex as OZIndex,
Scorecard_ObjectiveCats.IdentityLetter
FROM
Scorecard_Measure INNER JOIN Scorecard_Objectives 
ON Scorecard_Measure.ObjID=Scorecard_Objectives.ID
AND Scorecard_Measure.FiscalYear = '2011'
AND Scorecard_Measure.Publish='Y'
INNER JOIN Scorecard_ObjectiveCats 
ON Scorecard_Objectives.ObjCatID = Scorecard_ObjectiveCats.ID
ORDER BY Scorecard_Measure.LastUpdated DESC

SQL连接不返回所有字段值;订单更改时返回的不同字段值

1 个答案: