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Gets or sets a Google BigQuery statement to delete records from the data set.
Syntax
Property Value
A
BigQueryCommand used during an update operation to delete records in Google BigQuery that correspond to deleted rows in the
System.Data.DataSet.
Example
The following example demonstrates how to retrieve and manipulate data using
BigQueryDataAdapter.
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public void UseDataAdapter(BigQueryConnection bigQueryConnection)
{
BigQueryDataAdapter myAdapter = new BigQueryDataAdapter("SELECT DeptNo, DName FROM Dept", bigQueryConnection);
myAdapter.MissingSchemaAction = MissingSchemaAction.AddWithKey;
DataSet myDataSet = new DataSet();
myAdapter.Fill(myDataSet,"Departments");
myDataSet.Tables["Departments"].Rows[3].Delete();
myAdapter.DeleteCommand = new BigQueryCommand("DELETE FROM Dept WHERE DeptNo = :DeptNo", bigQueryConnection);
myAdapter.DeleteCommand.Parameters.Add("DeptNo", BigQueryType.Int, 0, "DeptNo").SourceVersion = DataRowVersion.Original;
myAdapter.Update(myDataSet,"Departments");
//Get all data from all tables within the dataset
foreach(DataTable myTable in myDataSet.Tables)
{
foreach(DataRow myRow in myTable.Rows)
{
foreach (DataColumn myColumn in myTable.Columns)
{
Console.Write(myRow[myColumn]+"\t");
}
Console.WriteLine();
}
Console.WriteLine();
}
} |
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Public Sub UseDataAdapter(ByVal bigQueryConnection As BigQueryConnection)
Dim myAdapter As BigQueryDataAdapter = New BigQueryDataAdapter("SELECT DeptNo, DName FROM Dept", bigQueryConnection)
myAdapter.MissingSchemaAction = MissingSchemaAction.AddWithKey
Dim myDataSet As DataSet = New DataSet
myAdapter.Fill(myDataSet, "Departments")
myDataSet.Tables("Departments").Rows(3).Delete()
myAdapter.DeleteCommand = New BigQueryCommand("DELETE FROM Dept WHERE DeptNo = :DeptNo", bigQueryConnection)
myAdapter.DeleteCommand.Parameters.Add("DeptNo", BigQueryType.Int, 0, "DeptNo").SourceVersion = DataRowVersion.Original
myAdapter.Update(myDataSet, "Departments")
Dim myTable As DataTable
Dim myRow As DataRow
Dim myColumn As DataColumn
' Get all data from all tables within the dataset
For Each myTable In myDataSet.Tables
For Each myRow In myTable.Rows
For Each myColumn In myTable.Columns
Console.Write(myRow(myColumn) & Chr(9))
Next myColumn
Console.WriteLine()
Next myRow
Console.WriteLine()
Next myTable
End Sub |
See Also
