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 = "URL=https://my999999.businessbydesign.cloud.sap;User=username;Password=password;ServiceType=AnalyticsService;ServiceName=servicename;"; using (SAPByDesignConnection connection = new SAPByDesignConnection(connectionString)) { int rowsAffected; SAPByDesignCommand cmd = new SAPByDesignCommand("DELETE FROM Account WHERE Id = @myId", connection); cmd.Parameters.Add(new SAPByDesignParameter("myId","1")); rowsAffected = cmd.ExecuteNonQuery(); }
VB.NET
Dim connectionString As [String] = "URL=https://my999999.businessbydesign.cloud.sap;User=username;Password=password;ServiceType=AnalyticsService;ServiceName=servicename;" Using connection As New SAPByDesignConnection(connectionString) Dim rowsAffected As Integer Dim cmd As New SAPByDesignCommand("DELETE FROM Account WHERE Id = @myId", connection) cmd.Parameters.Add(New SAPByDesignParameter("myId", "1")) rowsAffected = cmd.ExecuteNonQuery() End Using