To modify existing records, use UPDATE statements.

Update Syntax

The UPDATE statement takes as input a comma-separated list of columns and new column values as name-value pairs in the SET clause, as shown in the following example:

UPDATE <table_name> SET { <column_reference> = <expression> } [ , ... ] WHERE { Id = <expression>  } [ { AND | OR } ... ] 

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

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

C#

String connectionString = " Url=http://localhost/woocommerce/;ConsumerKey=ck_ec52c76185c088ecaa3145287c8acba55a6f59ad;ConsumerSecret=cs_9fde14bf57126156701a7563fc87575713c355e5;";
using (WooCommerceConnection connection = new WooCommerceConnection(connectionString)) {
  int rowsAffected;
  WooCommerceCommand cmd = new WooCommerceCommand("UPDATE Orders SET Total='John' WHERE Id = @myId", connection);
  cmd.Parameters.Add(new WooCommerceParameter("myId","6"));
  rowsAffected = cmd.ExecuteNonQuery();
}

VB.NET

Dim connectionString As [String] = " Url=http://localhost/woocommerce/;ConsumerKey=ck_ec52c76185c088ecaa3145287c8acba55a6f59ad;ConsumerSecret=cs_9fde14bf57126156701a7563fc87575713c355e5;"
Using connection As New WooCommerceConnection(connectionString)
  Dim rowsAffected As Integer
  Dim cmd As New WooCommerceCommand("UPDATE Orders SET Total='John' WHERE Id = @myId", connection)
  cmd.Parameters.Add(New WooCommerceParameter("myId", "6"))
  rowsAffected = cmd.ExecuteNonQuery()
End Using