char query[255];
sprintf(query, "SELECT AccountNumber FROM Accounts WHERE AccountNumber='%d'", accountNumber);

openConnection(call);
MYSQL* mysql = call->mysql;
mysql_real_query(mysql, query, strlen(query));
MYSQL_RES * res = mysql_store_result(mysql);

MYSQL_ROW row = mysql_fetch_row(res);

int retVal = row ? accountNumber : 0;
mysql_free_result(res);
mysql_close(mysql);
return retVal;