campo data e formattazione tabella

[lid]

Mi da questo errori
Warning: mssql_query() [function.mssql-query]: message: 'date_format' is not a recognized function name. (severity 15) in C:\Program Files\xampp\htdocs\intranet\testa2.php on line 94

Warning: mssql_query() [function.mssql-query]: Query failed in C:\Program Files\xampp\htdocs\intranet\testa2.php on line 94
DB Error, could not list tablesn

per sicurezza copio il codice ma dovrebbe essere giusto

 if($azienda == "Telephony Daily kkkk"){
    $sql = $sql = "SELECT Queue, Answered,Net_Offered, Answered_Percent, Speed_To_Answer, AHT, date_format(Date, '%d-%m-%Y') as data_it 
     from [$azienda]";