ODBC Driver for Cassandra

Build 20.0.7587

SELECT INTO ステートメント

SELECT INTO ステートメントを使って、書式付きデータをファイルにエクスポートできます。

SQL クエリを使ったデータのエクスポート

次のクエリは、comma-separated values(CSV)ファイルフォーマットにデータをエクスポートします。

SELECT Id, Name INTO [csv://Account.txt] FROM [Account] WHERE Industry = 'Floppy Disks'
ファイルURI で他のフォーマットを指定できます。利用可能な区切り文字はタブ、セミコロン、カンマです。デフォルトはカンマです。次の例は、tab-separated values(TSV)にエクスポートします。
SELECT Id, Name INTO [csv://Account.txt;delimiter=tab] FROM [Account] WHERE Industry = 'Floppy Disks'

C#

String connectionString = "Database=MyCassandraDB;Port=9042;Server=127.0.0.1;";

using (CassandraConnection connection = new CassandraConnection(connectionString)) {
  CassandraCommand cmd = new CassandraCommand("SELECT Id, Name INTO [csv://Account.txt] FROM [Account] WHERE Industry = 'Floppy Disks' ", connection);
  int rowsAffected = cmd.ExecuteNonQuery();
} 

VB.NET

Dim connectionString As [String] = "Database=MyCassandraDB;Port=9042;Server=127.0.0.1;" 

Using connection As New CassandraConnection(connectionString)
  Dim cmd As New CassandraCommand("SELECT Id, Name INTO [csv://Account.txt] FROM [Account] WHERE Industry = 'Floppy Disks'", connection)
  Dim rowsAffected As Integer = cmd.ExecuteNonQuery()
End Using
URI で他のファイルフォーマットを指定できます。以下の例は、tab-separated values(TSV)にエクスポートします。

C#

String connectionString = "Database=MyCassandraDB;Port=9042;Server=127.0.0.1;";

using (CassandraConnection connection = new CassandraConnection(connectionString)) {
  CassandraCommand cmd = new CassandraCommand("SELECT * INTO [Account] IN [csv://filename=c:/Account.csv;delimiter=tab] FROM [Account] WHERE Industry = 'Floppy Disks'", connection);
  int rowsAffected = cmd.ExecuteNonQuery();
} 

VB.NET

Dim connectionString As [String] = "Database=MyCassandraDB;Port=9042;Server=127.0.0.1;" 

Using connection As New CassandraConnection(connectionString)
  Dim cmd As New CassandraCommand("SELECT * INTO [Account] IN [csv://filename=c:/Account.csv;delimiter=tab] FROM [Account] WHERE Industry = 'Floppy Disks'", connection)
  Dim rowsAffected As Integer = cmd.ExecuteNonQuery()
End Using

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Build 20.0.7587