如何实现select * from emp_name?
在例程里面只有
retcode = SQLExecDirect(hstmt,
"SELECT CUSTID, NAME, PHONE FROM CUSTOMERS ORDER ",
SQL_NTS);
if (retcode == SQL_SUCCESS)
{ SQLGetData(hstmt, 1, SQL_C_ULONG, &sCustID, 0, &cbCustID);
SQLGetData(hstmt, 2, SQL_C_CHAR, szName, NAME_LEN, &cbName);
SQLGetData(hstmt, 3, SQL_C_CHAR, szPhone, PHONE_LEN,
&cbPhone);
}
这个只是对已知的数据库调用,如果我要是不知道有些什么属性列的话,怎么办?