ADO.NET Provider for Azure Table Storage

Build 24.0.9062

UPDATE ステートメント

既存のレコードを変更するには、UPDATE ステートメントを使用します。

Update 構文

UPDATE 構文はカンマ区切りのカラムをインプットとして取り、SET 句のname-value ペアを新しいカラム値として取ります。

UPDATE <table_name> SET <select_statement> | {<column_reference> = <expression> [ , ... ]} WHERE { Id = <expression>  } [ { AND | OR } ... ] 

<expression> ::=
  | @ <parameter> 
  | ?
  | <literal>
ExecuteNonQuery メソッドを使って、データ操作コマンドを実行し影響を受けた行を取得できます。

C#

String connectionString = "AccessKey=myAccessKey;Account=myAccountName;";
using (AzureTablesConnection connection = new AzureTablesConnection(connectionString)) {
  int rowsAffected;
  AzureTablesCommand cmd = new AzureTablesCommand("UPDATE NorthwindProducts SET Name='Jane Doe' WHERE Id = @myId", connection);
  cmd.Parameters.Add(new AzureTablesParameter("myId","1"));
  rowsAffected = cmd.ExecuteNonQuery();
}

VB.NET

Dim connectionString As [String] = "AccessKey=myAccessKey;Account=myAccountName;"
Using connection As New AzureTablesConnection(connectionString)
  Dim rowsAffected As Integer
  Dim cmd As New AzureTablesCommand("UPDATE NorthwindProducts SET Name='Jane Doe' WHERE Id = @myId", connection)
  cmd.Parameters.Add(New AzureTablesParameter("myId", "1"))
  rowsAffected = cmd.ExecuteNonQuery()
End Using

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Build 24.0.9062