Execute aggregate function: sum


   

using System;
using System.Data;
using System.Data.OleDb;

public class DatabaseInfo {    
 public static void Main () { 
   String connect = "Provider=Microsoft.JET.OLEDB.4.0;data source=.Employee.mdb";
   OleDbConnection con = new OleDbConnection(connect);
   con.Open();  
   Console.WriteLine("Made the connection to the database");

   OleDbCommand command = con.CreateCommand();
   command.CommandText ="SELECT SUM(salary) FROM Employee";
   Console.WriteLine("Sum of salary: {0:C}",(decimal)command.ExecuteScalar());


   con.Close();
 }
}