ADO.NET Provider for Quandl

Build 20.0.7587

Result Sets

You can access the same column information about the results of a query that you can for table schemas. See Columns for the columns returned.

Retrieving Result Set Metadata

You can use the GetSchemaTable method of the QuandlDataReader to retrieve result set metadata. Call GetSchemaTable after calling ExecuteReader.

Each row of the DataTable describes a column in the query's result.

C#

string connectionString = "ApiKey=abc123;DatabaseCode=WIKI;";

using (QuandlConnection conn = new QuandlConnection(connectionString)) {
  QuandlCommand cmd = new QuandlCommand("SELECT * FROM AAPL WHERE collapse = 'daily'", conn);
  QuandlDataReader rdr = cmd.ExecuteReader();
  DataTable schemaTable = rdr.GetSchemaTable();
  foreach (DataRow row in schemaTable.Rows) {
    foreach (DataColumn col in schemaTable.Columns) {
      Console.WriteLine("{0}: {1}", col.ColumnName, row[col]);
    }
  }
}

VB.NET

Dim connectionString As String = "ApiKey=abc123;DatabaseCode=WIKI;"

Using conn As New QuandlConnection(connectionString)
  Dim cmd As New QuandlCommand("SELECT * FROM AAPL WHERE collapse = 'daily'", conn)
  Dim rdr As QuandlDataReader = cmd.ExecuteReader()
  Dim schemaTable As DataTable = rdr.GetSchemaTable()
  For Each row As DataRow In schemaTable.Rows
    For Each col As DataColumn In schemaTable.Columns
      Console.WriteLine("{0}: {1}", col.ColumnName, row(col))
    Next
  Next
End Using

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Build 20.0.7587