ADO.NET Provider for Business b-ridge

Build 20.0.7654

DELETE ステートメント

テーブルから情報を削除するには、DELETE ステートメントを使用します。

DELETE 構文

DELETE ステートメントには、次の例に示すように、FROM 句のテーブル名とWHERE 句の行の主キーが必要です。

<delete_statement> ::= DELETE FROM <table_name> WHERE { Id = <expression> } [ { AND | OR } ... ]

<expression> ::=
  | @ <parameter> 
  | ?
  | <literal>

次の例に示すように、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る行数を取得できます。

C#

String connectionString = "ConnectionProperty1=Value1;ConnectionProperty2=Value2";
using (BusinessbridgeConnection connection = new BusinessbridgeConnection(connectionString)) {
  int rowsAffected;
  BusinessbridgeCommand cmd = new BusinessbridgeCommand("DELETE FROM CDATA WHERE Id = @myId", connection);
  cmd.Parameters.Add(new BusinessbridgeParameter("myId","6"));
  rowsAffected = cmd.ExecuteNonQuery();
}

VB.NET

  
Dim connectionString As [String] = "ConnectionProperty1=Value1;ConnectionProperty2=Value2"
Using connection As New BusinessbridgeConnection(connectionString)
  Dim rowsAffected As Integer
  Dim cmd As New BusinessbridgeCommand("DELETE FROM CDATA WHERE Id = @myId", connection)
  cmd.Parameters.Add(New BusinessbridgeParameter("myId", "6"))
  rowsAffected = cmd.ExecuteNonQuery()
End Using

Copyright (c) 2020 CData Software, Inc. - All rights reserved.
Build 20.0.7654