Question

我在我的表中使用asp.net和msaccess2003以及30到40列，我想要选择所有列，但除了特定列之外，不需要我在程序执行时知道的列

Answer 1

在VB.NET中，使用一条记录加载DataTable。然后，您可以构建一个列的列，不包括您要排除的列。

Dim tblTemp As DataTable
Dim SQL As String = "SELECT TOP 1 * FROM MyTable"
'Fill tblTemp from the above sql 

' generate a columns list string excluding the Blah column
Dim L As Integer
Dim columns As String
For L = 0 To tblTemp.Columns.Count - 1
    If tblTemp.Columns(L).ColumnName <> "Blah" Then
        If columns <> "" Then columns &= ", "
        columns &= tblTemp.Columns(L).ColumnName
    End If
Next

Dim FinalSQL As String
FinalSQL = "SELECT " & columns & " FROM MyTable"

Answer 2

/* Get the data into a temp table */
SELECT * INTO #TempTable
FROM YourTable

/* Drop the cloumns that are not needed */
ALTER TABLE #TempTable
DROP COLUMN ColumnToDrop

  // Get results and drop temp table 
SELECT * FROM #TempTable
DROP TABLE #TempTable

希望这有帮助

选择除特定列以外的所有列

2 个答案: