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 { AccountId = <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://api.businesscentral.dynamics.com/v1.0/api/v1.0";
using (D365BusinessCentralConnection connection = new D365BusinessCentralConnection(connectionString)) {
  int rowsAffected;
  D365BusinessCentralCommand cmd = new D365BusinessCentralCommand("UPDATE Accounts SET Name='John' WHERE AccountId = @myAccountId", connection);
  cmd.Parameters.Add(new D365BusinessCentralParameter("myAccountId","'00000000-0000-0000-0000-000000000000'"));
  rowsAffected = cmd.ExecuteNonQuery();
}

VB.NET

Dim connectionString As [String] = "InitiateOAuth=GETANDREFRESH;OrganizationUrl=https://api.businesscentral.dynamics.com/v1.0/api/v1.0"
Using connection As New D365BusinessCentralConnection(connectionString)
  Dim rowsAffected As Integer
  Dim cmd As New D365BusinessCentralCommand("UPDATE Accounts SET Name='John' WHERE AccountId = @myAccountId", connection)
  cmd.Parameters.Add(New D365BusinessCentralParameter("myAccountId", "'00000000-0000-0000-0000-000000000000'"))
  rowsAffected = cmd.ExecuteNonQuery()
End Using