You can use the SELECT INTO statement to export formatted data to a file.

Data Export with an SQL Query

The following query exports data into a file formatted in comma-separated values (CSV):

SELECT Type, DatasetName INTO [csv://Schemas.txt] FROM [Schemas] WHERE ProjectId = 'bigquery-public-data'

You can specify other formats in the file URI. The possible delimiters are tab, semicolon, and comma with the default being a comma. The following example exports tab-separated values:

SELECT Type, DatasetName INTO [csv://Schemas.txt;delimiter=tab] FROM [Schemas] WHERE ProjectId = 'bigquery-public-data'

C#

String connectionString = "InitiateOAuth=GETANDREFRESH;ProjectId=YourProjectId;";

using (GoogleDataCatalogConnection connection = new GoogleDataCatalogConnection(connectionString)) {
  GoogleDataCatalogCommand cmd = new GoogleDataCatalogCommand("SELECT Type, DatasetName INTO [csv://Schemas.txt] FROM [Schemas] WHERE ProjectId = 'bigquery-public-data' ", connection);
  int rowsAffected = cmd.ExecuteNonQuery();
} 

VB.NET

Dim connectionString As [String] = "InitiateOAuth=GETANDREFRESH;ProjectId=YourProjectId;" 

Using connection As New GoogleDataCatalogConnection(connectionString)
  Dim cmd As New GoogleDataCatalogCommand("SELECT Type, DatasetName INTO [csv://Schemas.txt] FROM [Schemas] WHERE ProjectId = 'bigquery-public-data'", connection)
  Dim rowsAffected As Integer = cmd.ExecuteNonQuery()
End Using

You can specify other file formats in the URI. The following example exports tab-separated values:

C#

String connectionString = "InitiateOAuth=GETANDREFRESH;ProjectId=YourProjectId;";

using (GoogleDataCatalogConnection connection = new GoogleDataCatalogConnection(connectionString)) {
  GoogleDataCatalogCommand cmd = new GoogleDataCatalogCommand("SELECT * INTO [Schemas] IN [csv://filename=c:/Schemas.csv;delimiter=tab] FROM [Schemas] WHERE ProjectId = 'bigquery-public-data'", connection);
  int rowsAffected = cmd.ExecuteNonQuery();
} 

VB.NET

Dim connectionString As [String] = "InitiateOAuth=GETANDREFRESH;ProjectId=YourProjectId;" 

Using connection As New GoogleDataCatalogConnection(connectionString)
  Dim cmd As New GoogleDataCatalogCommand("SELECT * INTO [Schemas] IN [csv://filename=c:/Schemas.csv;delimiter=tab] FROM [Schemas] WHERE ProjectId = 'bigquery-public-data'", connection)
  Dim rowsAffected As Integer = cmd.ExecuteNonQuery()
End Using