SQLHENV henv = SQL_NULL_HENV;      
    SQLHDBC hdbc1 = SQL_NULL_HDBC;      
    SQLHSTMT hstmt1 = SQL_NULL_HSTMT;
    RETCODE retcode;      
    UCHAR   szDSN[SQL_MAX_DSN_LENGTH+1]    = "myde",      
            szUID[MAXNAME]   =   "sa",      
            szAuthStr[MAXNAME]   =   "123456";


    UCHAR   sql[42] = "select * from SC where Cno = 1";  

    retcode   =   SQLAllocHandle   (SQL_HANDLE_ENV,   NULL,   &henv);
    retcode   =   SQLSetEnvAttr(henv,   SQL_ATTR_ODBC_VERSION,      
                  (SQLPOINTER)SQL_OV_ODBC3,      
                  SQL_IS_INTEGER);
    retcode   =   SQLAllocHandle(SQL_HANDLE_DBC,   henv,   &hdbc1);   
    retcode   =   SQLConnect(hdbc1, (SQLCHAR*) szDSN,  SQL_NTS,   (SQLCHAR*)szUID,   SQL_NTS,   (SQLCHAR*)szAuthStr,  SQL_NTS);  
         if(retcode == SQL_SUCCESS || retcode == SQL_SUCCESS_WITH_INFO)
    {
        printf("connnect access ok!\n");
    retcode   =   SQLAllocHandle(SQL_HANDLE_STMT,   hdbc1,   &hstmt1);
    printf("%d",retcode);
    retcode   =   SQLExecDirect (hstmt1,sql,30);   
    printf("%d",retcode);                                    //retcode == -1问题出在这
        
        SQLBindCol(hstmt1, 1, SQL_C_CHAR , list, 5, 0);
        do{   
            retcode = SQLFetch(hstmt1);  
            printf("%d\n",retcode);
            if(retcode != 0){   
                break;   
            }   
            printf("%s/n",list);   
        }while(1);   
    }
数据库已经连接  但是数据不能fetch 标注位置开始返回值出错，别的地方的代码有对数据库名的描述 这个程序没有 请问各位大神问题出在哪儿？