ADO.NET Provider for HubDB

Build 24.0.9060

DELETE Statements

To delete information from a table, use DELETE statements.

DELETE Syntax

The DELETE statement requires the table name in the FROM clause and the row's primary key in the WHERE clause, as shown in the following example:

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

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

You can use the ExecuteNonQuery method to execute data manipulation commands and retrieve the number of affected rows, as shown in the following example:

C#

String connectionString = "AuthScheme=OAuth;OAuthClientID=MyOAuthClientID;OAuthClientSecret=MyOAuthClientSecret;CallbackURL=http://localhost:33333;";
using (HubDBConnection connection = new HubDBConnection(connectionString)) {
  int rowsAffected;
  HubDBCommand cmd = new HubDBCommand("DELETE FROM NorthwindProducts WHERE Id = @myId", connection);
  cmd.Parameters.Add(new HubDBParameter("myId","1"));
  rowsAffected = cmd.ExecuteNonQuery();
}

VB.NET

  
Dim connectionString As [String] = "AuthScheme=OAuth;OAuthClientID=MyOAuthClientID;OAuthClientSecret=MyOAuthClientSecret;CallbackURL=http://localhost:33333;"
Using connection As New HubDBConnection(connectionString)
  Dim rowsAffected As Integer
  Dim cmd As New HubDBCommand("DELETE FROM NorthwindProducts WHERE Id = @myId", connection)
  cmd.Parameters.Add(New HubDBParameter("myId", "1"))
  rowsAffected = cmd.ExecuteNonQuery()
End Using

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Build 24.0.9060