how to map sql column to custom names

1var sql = "SELECT Contact_Cli_ID AS Contact_ID,
2                  Clt_ID AS Client_ID,
3                  Contact_Cli_Nom AS Nom,
4                  Contact_Cli_Prenom AS Prenom,
5                  Contact_Tel_Fixe AS Telephone,
6                  Contact_Cli_Fax AS Telecopie,
7                  Contact_Cli_Mail AS Mail,
8                  Contact_Portable AS Portable
9           FROM   Contact_Clients
10           ...";