WHERE子句具有有效的无效参数

Question

我有一个交叉表查询，如下所示：

TRANSFORM Sum([Raw Scores].[Raw Score]) AS SumOfScore
SELECT [Raw Scores].PlayerID, [Raw Scores].[First Name], [Raw Scores].[Last Name], [Raw Scores].[Round Number], Sum([Raw Scores].Score) AS [Final Score], Sum([Raw Scores].[Raw Score]) AS [Total Shots]
FROM [Raw Scores]
WHERE [Round Number] = [Enter Round Number:]
GROUP BY [Raw Scores].PlayerID, [Raw Scores].[First Name], [Raw Scores].[Last Name], [Raw Scores].[Round Number]
PIVOT [Raw Scores].[Hole ID];

[Raw Scores].[Round Number]是另一个表格中的一列，其中包含数据 但是，this.[Enter Round Number:]是一个参数。

问题：

我要做的是按照他们获得的回合对所有得分进行排序，然而，WHERE条款似乎有问题。
每当使用非列名称时，它都会发出以下错误：

但是，当使用一个确定的值（一个写在查询中而不是一个参数）时，查询运行得非常好。

TRANSFORM Sum([Raw Scores].[Raw Score]) AS SumOfScore
SELECT [Raw Scores].PlayerID, [Raw Scores].[First Name], [Raw Scores].[Last Name], [Raw Scores].[Round Number], Sum([Raw Scores].Score) AS [Final Score], Sum([Raw Scores].[Raw Score]) AS [Total Shots]
FROM [Raw Scores]
WHERE [Round Number] = 1
GROUP BY [Raw Scores].PlayerID, [Raw Scores].[First Name], [Raw Scores].[Last Name], [Raw Scores].[Round Number]
PIVOT [Raw Scores].[Hole ID];

注意： [Raw Scores]是一个查询。将带有参数的WHERE子句添加到该查询会产生完美的结果，但是当与上述查询一起使用时，它会显示错误消息（如上图所示）......

这是[Raw Scores]查询，其参数有效（并且其中包含未知变量）：

SELECT Scores.PlayerID, Scores.Score AS [Raw Score], Scores.[Hole ID], Holes.Par, IIf([Raw Score]=0,Holes.Par,[Raw Score]-Holes.Par) AS Score, Players.[First Name], Players.[Last Name], Scores.[Round Number], Players.Country
FROM (Scores INNER JOIN Holes ON Scores.[Hole ID] = Holes.[Hole Number]) INNER JOIN Players ON Scores.PlayerID = Players.[Player ID]
WHERE [Round Number] = [Enter Round Number:];

更新：未将参数定义为字段似乎可以解决问题，但为了便于阅读，我仍然需要显示正确的名称。

TRANSFORM Sum([Raw Scores].[Raw Score]) AS SumOfScore
SELECT [Raw Scores].PlayerID, [Raw Scores].[First Name], [Raw Scores].[Last Name], [Raw Scores].[Round Number], Sum([Raw Scores].Score) AS [Final Score], Sum([Raw Scores].[Raw Score]) AS [Total Shots]
FROM [Raw Scores]
WHERE [Round Number] = ?
GROUP BY [Raw Scores].PlayerID, [Raw Scores].[First Name], [Raw Scores].[Last Name], [Raw Scores].[Round Number]
PIVOT [Raw Scores].[Hole ID];

问题：

如何让查询正常工作;要求价值？

像这样：

Answer 1

问题在于

WHERE [Round Number] = [Enter Round Number:]

然后它将[输入Round Number：]视为表达式或值，看起来它们都不是它们，因此您得到了您提到的错误。

您需要为[Enter Round Number：]表达式提供适当的值。您可以在参数中传递值，然后就可以使用它。您可以使用QueryDefs，然后使用参数创建查询。

Imports Data.OleDb

dim cmd as new OleDbCommand
cmd.Connection = con
cmd.CommandType = CommandType.Text
cmd.CommandText = "SELECT [Raw Scores].PlayerID, [Raw Scores].[First Name], [Raw Scores].[Last Name], [Raw Scores].[Round Number], Sum([Raw Scores].Score) AS [Final Score], Sum([Raw Scores].[Raw Score]) AS [Total Shots]
FROM [Raw Scores]
WHERE [RoundNumber] = ?
GROUP BY [Raw Scores].PlayerID, [Raw Scores].[First Name], [Raw Scores]. [Last Name], [Raw Scores].[Round Number]
PIVOT [Raw Scores].[Hole ID];"

cmd.Parameters.Add("@RoundNumber", OleDbType.VarChar).value = "RoundNumber"

Dim da as new OleDbDataAdapter(cmd)

Answer 2

显然，你所要做的就是在检查它是否是一个字段时将其嵌套以清除混淆。

PARAMETERS [Enter Round Number:] Value;
TRANSFORM Sum([Raw Scores].[Raw Score]) AS SumOfScore
SELECT [Raw Scores].PlayerID, [Raw Scores].[First Name], [Raw Scores].[Last Name], [Raw Scores].[Round Number], Sum([Raw Scores].Score) AS [Final Score], Sum([Raw Scores].[Raw Score]) AS [Total Shots]
FROM [Raw Scores]
WHERE ((([Raw Scores].[Round Number])=[Enter Round Number:]))
GROUP BY [Raw Scores].PlayerID, [Raw Scores].[First Name], [Raw Scores].[Last Name], [Raw Scores].[Round Number]
PIVOT [Raw Scores].[Hole ID];