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 { CardId = <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 = "APIKey=myApiKey;Token=myGeneratedToken;"; using (TrelloConnection connection = new TrelloConnection(connectionString)) { int rowsAffected; TrelloCommand cmd = new TrelloCommand("DELETE FROM Cards WHERE CardId = @myCardId", connection); cmd.Parameters.Add(new TrelloParameter("myCardId","5835594ee009411c6abdbfbd")); rowsAffected = cmd.ExecuteNonQuery(); }
VB.NET
Dim connectionString As [String] = "APIKey=myApiKey;Token=myGeneratedToken;" Using connection As New TrelloConnection(connectionString) Dim rowsAffected As Integer Dim cmd As New TrelloCommand("DELETE FROM Cards WHERE CardId = @myCardId", connection) cmd.Parameters.Add(New TrelloParameter("myCardId", "5835594ee009411c6abdbfbd")) rowsAffected = cmd.ExecuteNonQuery() End Using