Question

当我尝试执行查询时，我遇到了问题。我收到了这个错误：

无法找到列“m”或用户定义的函数或聚合“m.gender”，或者名称不明确

代码：

 myConnection.Open()
 Dim myReader As SqlDataReader = myCommand.ExecuteReader() /* Problem is here */

 Return myReader

当我直接在SQL Server中执行时，查询运行正常。问题是在我的应用程序中的按钮单击事件上执行它。（VB.NET）

请检查我的整个查询

    SELECT pt.color as Color, m.model As Model, m.gender AS Gender,

       SUM(CASE 
             WHEN MONTH(o.data_ins) = 1 THEN 1 
             ELSE 0 
       END) Jan,

       SUM(CASE 
             WHEN MONTH(o.data_ins) = 2 THEN 1 
             ELSE 0 
       END) Feb, 

       SUM(CASE 
             WHEN MONTH(o.data_ins) = 3 THEN 1 
             ELSE 0 
       END) Mar, 

       SUM(CASE 
             WHEN MONTH(o.data_ins) = 4 THEN 1 
             ELSE 0 
       END) Apr,

       SUM(CASE 
             WHEN MONTH(o.data_ins) = 5 THEN 1 
             ELSE 0 
       END) May,

       SUM(CASE 
             WHEN MONTH(o.data_ins) = 6 THEN 1 
             ELSE 0 
       END) Jun,

       SUM(CASE 
             WHEN MONTH(o.data_ins) = 7 THEN 1 
             ELSE 0 
       END) Jul,

       SUM(CASE 
             WHEN MONTH(o.data_ins) = 8 THEN 1 
             ELSE 0 
       END) Ago,

       SUM(CASE 
             WHEN MONTH(o.data_ins) = 9 THEN 1 
             ELSE 0 
       END) Sep,

       SUM(CASE 
             WHEN MONTH(o.data_ins) = 10 THEN 1 
             ELSE 0 
       END) Oct,

       SUM(CASE 
             WHEN MONTH(o.data_ins) = 11 THEN 1 
             ELSE 0 
       END) Nov,

       SUM(CASE 
             WHEN MONTH(o.data_ins) = 12 THEN 1 
             ELSE 0 
       END) Dec

FROM   models m 
       INNER JOIN product_type pt 
               ON m.model_id = pt.model_id
       INNER JOIN product_orders po 
               ON pt.producttype_id = po.producttype_id 
       INNER JOIN orders o 
               ON po.order_id = o.order_id 

WHERE YEAR(o.date_ins) = 2013 and pt.available = 1 and p.status = 'shipped'

GROUP  BY pt.color,
        m.model, 
          m.gender

ORDER BY  pt.color,
        m.model, 
          m.gender

＆GT;

Public Shared Function ExecutaReader(ByVal strSQL)

        Dim strConn As String
        strConn = ConfigurationSettings.AppSettings("strConn")

        Dim myConnection As New SqlConnection(strConn)
        Dim myCommand As New SqlCommand(strSQL, myConnection)

        myConnection.Open()
        Dim myReader As SqlDataReader = myCommand.ExecuteReader()

        Return myReader


    End Function

Answer 1

我认为返回表和表模型具有相同的列名性别

Try m.model As Model2, m.gender AS Gender2,

SqlException，我无法解决它

1 个答案: