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 = "Server=127.0.0.1;Port=8080;";
using (PrestoConnection connection = new PrestoConnection(connectionString)) {
  int rowsAffected;
  PrestoCommand cmd = new PrestoCommand("DELETE FROM [Hive].[Default].Customers WHERE Id = @myId", connection);
  cmd.Parameters.Add(new PrestoParameter("myId","1"));
  rowsAffected = cmd.ExecuteNonQuery();
}

VB.NET

  
Dim connectionString As [String] = "Server=127.0.0.1;Port=8080;"
Using connection As New PrestoConnection(connectionString)
  Dim rowsAffected As Integer
  Dim cmd As New PrestoCommand("DELETE FROM [Hive].[Default].Customers WHERE Id = @myId", connection)
  cmd.Parameters.Add(New PrestoParameter("myId", "1"))
  rowsAffected = cmd.ExecuteNonQuery()
End Using