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