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 <select_statement> | {<column_reference> = <expression> [ , ... ]} WHERE { GoalHeadingId = <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 = "InitiateOAuth=GETANDREFRESH;OrganizationUrl=https://myaccount.operations.dynamics.com/;Edition=Sales;";
using (Dynamics365Connection connection = new Dynamics365Connection(connectionString)) {
  int rowsAffected;
  Dynamics365Command cmd = new Dynamics365Command("UPDATE GoalHeadings SET GoalHeadingId='John' WHERE GoalHeadingId = @myGoalHeadingId", connection);
  cmd.Parameters.Add(new Dynamics365Parameter("myGoalHeadingId","'test'"));
  rowsAffected = cmd.ExecuteNonQuery();
}

VB.NET

Dim connectionString As [String] = "InitiateOAuth=GETANDREFRESH;OrganizationUrl=https://myaccount.operations.dynamics.com/;Edition=Sales;"
Using connection As New Dynamics365Connection(connectionString)
  Dim rowsAffected As Integer
  Dim cmd As New Dynamics365Command("UPDATE GoalHeadings SET GoalHeadingId='John' WHERE GoalHeadingId = @myGoalHeadingId", connection)
  cmd.Parameters.Add(New Dynamics365Parameter("myGoalHeadingId", "'test'"))
  rowsAffected = cmd.ExecuteNonQuery()
End Using