mysql - VB.Net DataSet找不到表

Question

我有一个问题。我应该在一些表之间进行连接

sql = "select * from prodotto as p,fornitore as f,categoria as c where   
p.codice_fornitore=p.codice and p.codice_categoria=c.codice and p.codice='" & cod.Text & "'"

 
但是当我可以使用数据适配器填充数据集时，我应该使用哪个名称来引用查询结果。是具有默认名称的临时表吗？

Answer 1

例如，

Private Sub FilldgvMyGrid()
   Dim SourceDataSet As New DataSet
   Dim adapter As New NpgsqlDataAdapter("select * from prodotto as p,fornitore as 
       f,categoria as c where p.codice_fornitore=p.codice and p.codice_categoria=c.codice    
       and p.codice='" & cod.Text & "'", yourSqlConn)

    adapter.Fill(SourceDataSet)
     /*if you have a Datagridview called dgvMyGrid */
    dgvMyGrid.DataSource = SourceDataSet.Tables(0)

End Sub