小编ali*_*ali的帖子

我有

• table1 : country,theOrderColumn1
• 表2 : country,theOrderColumn2

我想country从这两个SELECT语句加入DISTINCT :

SELECT DISTINCT `country` FROM `table1` ORDER BY `theOrderColumn1`

和

SELECT DISTINCT `country` FROM `table2` ORDER BY `theOrderColumn2`

例:

table1 (country, theOrderColumn1): (uk, 1), (usa, 2)
table2 (country, theOrderColumn2): (france, 1), (uk, 2)

我想要这个结果:

france
uk
usa

我需要得到简单的javascript abject的真实顺序,但我从这段代码得到错误的答案:

var Obj={"x":"z", "2":"a", "1":"b"};
for(i in Obj)
    document.write(Obj[i]+"<br>");

我希望看到z,a,b的答案,但我得到b,a,z
见行动代码: http://jsfiddle.net/gpP7m/