// Deletes a record.
private static void Delete(DbDataAccess dbDataAccess
    , DbColumns dataDefinition)
{
    // Create Key Columns.
    var keyColumns = new DbColumns()
    {
        { "Name", (object)"TestNameUpdated" }
    };
    dataDefinition.LJCSetExcludeKeyValue("PrincipleFlag");

    var queryKeyColumns = DbCommon.QueryKeys(keyColumns, dataDefinition);
    DbRequest dbRequest = new DbRequest()
    {
        KeyColumns = queryKeyColumns
        QueryType = QueryType.Delete.ToString(),
        TableName = "PersonTest",
    };
    DbResult dbResult = dbDataAccess.Execute(dbRequest);

    if (dbResult != null)
    {
        string sqlStatement = dbResult.ExecutedSql;
    }
}