以下是使用VBA在Access中计算数据的中位数的代码示例：

首先，将数据表中的数据按两列分组，并将中位数计算为新列：

SELECT Table1.ColumnA, Table1.ColumnB, IIF(COUNT() Mod 2 = 0, AVG(DLookUp("[DataColumn]", "[Table1]", "[ColumnA] = '" & [Table1].[ColumnA] & "' AND [ColumnB] = '" & [Table1].[ColumnB] & "' AND " & _ "[DataColumn] NOT IN (SELECT TOP " & (COUNT() / 2) _ & " [DataColumn] FROM [Table1] WHERE [ColumnA] = '"_ & [Table1].[ColumnA] & "' AND [ColumnB] = '"_ & [Table1].[ColumnB] & "' ORDER BY [DataColumn] ASC)) _

• DLookUp("[DataColumn]", "[Table1]", "[ColumnA] = '" & [Table1].[ColumnA] & "' AND [ColumnB] = '" & [Table1].[ColumnB] & "' AND " & _ "[DataColumn] IN (SELECT TOP " & (COUNT() / 2) _ & " [DataColumn] FROM [Table1] WHERE [ColumnA] = '"_ & [Table1].[ColumnA] & "' AND [ColumnB] = '"_ & [Table1].[ColumnB] & "' ORDER BY [DataColumn] ASC)) _ / 2, DLookUp("[DataColumn]", "[Table1]", "[ColumnA] = '" _ & [Table1].[ColumnA] & "' AND [ColumnB] = '" & [Table1].[ColumnB] & "' AND " & _ "[DataColumn] IN (SELECT TOP " & ROUND(COUNT() / 2, 0, 1) _ & " [DataColumn] FROM [Table1] WHERE [ColumnA] = '"_ & [Table1].[ColumnA] & "' AND [ColumnB] = '"_ & [Table1].[ColumnB] & "' ORDER BY [DataColumn] ASC))) AS MedValue FROM Table1 GROUP BY Table1.ColumnA, Table1.ColumnB;