在MS Access中，SQL Server链接表传递查询

Question

我有一个针对MS Access中使用SQL Server的getdate()函数的链接表的查询。然而，当我尝试运行查询时，会出现以下错误：

函数中未定义的函数GetDate

如何创建允许使用SQL Server T-SQL语法的链接表？我看到这被称为pass through query，但我不知道如何将其设置为使用链接表上的连接作为传递查询。

当前使用Access 2010。查询是：

select getdate()

如果有帮助的话，我使用了以下vba代码来生成到SQLServer的表链接：

Function LinkTable(LinkedTableAlias As String, Server As String, Database As String, SourceTableName As String, OverwriteIfExists As Boolean, Username As String, Password As String)
    'This method will also update the link if the underlying table definition has been modified.
    If (InStr(1, LinkedTableAlias, "MSys") > 0) Then
        Log "Skipping " & LinkedTableAlias
        Exit Function
    End If
    'The overwrite parameter will cause it to re-map/refresh the link for LinktedTable Alias, but only if it was already a linked table.
    ' it will not overwrite an existing query or local table with the name specified in LinkedTableAlias.
    'Links to a SQL Server table without the need to set up a DSN in the ODBC Console.
    Dim tdfLinked As DAO.TableDef
    ' Open a database to which a linked table can be appended.
    Dim dbsCurrent As Database
    Set dbsCurrent = CurrentDb()
    'Check for and deal with the scenario ofthe table alias already existing
    If TableNameInUse(LinkedTableAlias) Then
        'If InStr(dbsCurrent.TableDefs(LinkedTableAlias).Connect, "AccessBackup") Then
        '    Exit Function
        'End If
        If (Not OverwriteIfExists) Then
            Log "Can't use name '" + LinkedTableAlias + "' because it would overwrite existing table."
            Exit Function
        End If
        'delete existing table, but only if it is a linked table
        'If IsLinkedTable(LinkedTableAlias) Then
            dbsCurrent.TableDefs.Delete LinkedTableAlias
            dbsCurrent.TableDefs.Refresh
        'Else
        '    Log "Can't use name '" + LinkedTableAlias + "' because it would overwrite an existing query or local table."
        '    Exit Function
        'End If
    End If
    'Create a linked table
    Set tdfLinked = dbsCurrent.CreateTableDef(LinkedTableAlias)
    tdfLinked.SourceTableName = SourceTableName
    tdfLinked.Connect = "ODBC;DRIVER={SQL Server};SERVER=" & Server & ";DATABASE=" & Database & ";UID=" & Username & ";PWD=" & Password & ";"
    On Error Resume Next
    dbsCurrent.TableDefs.Append tdfLinked
    If (err.Number = 3626) Then 'too many indexes on source table for Access
            err.Clear
            On Error GoTo 0
            If LinkTable(LinkedTableAlias, Server, Database, "vw" & SourceTableName, OverwriteIfExists, Username, Password) Then
                Log "Can't link directly to table '" + SourceTableName + "' because it contains too many indexes for Access to handle. Linked to view '" & "vw" & SourceTableName & "' instead."
                LinkTable = True
            Else
                Log "Can't link table '" + SourceTableName + "' because it contains too many indexes for Access to handle. Create a view named '" & "vw" & SourceTableName & "' that selects all rows/columns from '" & SourceTableName & "' and try again to circumvent this."
                LinkTable = False
            End If
            Exit Function
    End If
    On Error GoTo 0
    '** Turn on error handling
  On Error GoTo ErrorHandler:
    tdfLinked.RefreshLink

    LinkTable = True
    Exit Function
ErrorHandler:
    Log "refreshlink failed for " & tdfLinked.Name
    LinkTable = True

Answer 1

我不太理解这句话：

如何创建允许使用SQL Server T-SQL的链接表语法？

但这就是将现有的MS Access querydef转换为直通查询的方法：

进入查询中的设计模式，按Query菜单命令，然后按SQL Specific，再按Pass Through

请参阅此屏幕截图。

http://www.mssqltips.com/sqlservertip/1482/microsoft-access-pass-through-queries-to-sql-server/

Answer 2

出现错误的原因是GETDATE()不是MSAccess中的函数。您可能需要Now()来获取日期和时间，也可以使用Date()来提供日期

Answer 3

以下是创建直通查询的快速而肮脏的VBA方法：

Set qdf = CurrentDb.CreateQueryDef("testqry")
' this is just your connection string
qdf.Connect = "ODBC;Driver={SQL Server};Server=MSSQL1; Database=MyDB;Trusted_Connection=Yes"
'anything here gets passed directly to and executed on the SQL Server  
qdf.SQL = "select getdate()"
Set qdf = Nothing

现在，您可以使用"testqry"，就好像它是任何其他Access查询一样（无论如何，只要从中选择）

Answer 4

简单地将t-sql查询保存为通过

Select GetDate()

然后在VBA代码中，您可以转到：

TheSqlDate =  currentdb.QueryDefs("qPass").OpenRecordset()(0)

使用ADO和硬编码连接字符串，以及这里发布的大量其他代码，只是一种积累计费时间和创建世界poveity的方法。我发布的解决方案只是一行代码！