SQL通过order加入

Question

我有两张桌子

table 1
col1 date
1    13/4/2014
2    15/4/2014
3    17/4/2014
5    19/4/2014

table 2
col1 date
1    13/4/2014
3    16/4/2014
6    18/4/2014

joining the two tables i should get

col1 date       col2 date
1    13/4/2014  1    13/4/2014
2    15/4/2014
3    17/4/2014  3    16/4/2014
                6    18/4/2014
5    19/4/2014

重要的是date列应该排序,可以看到col数据6和5.这可能吗？

编辑:最后的表需要被命令col1.date并col2.date使得提前无论是在col1或col2将在连接表进行排序18/4/2014会之前,19/4/2014即使他们是在不同的列.我希望我明白我的观点.谢谢编辑:

table 1
1, "2014-04-03" 
2, "2014-04-04"
3, "2014-04-11"
4, "2014-04-16"
5, "2014-04-04"
6, "2014-04-17"
7, "2014-04-17"

table 2
1, "2014-04-04"
2, "2014-04-11"
5, "2014-04-17"

编辑:加入后应该是这样的

1 2014-04-03 
2 2014-04-04 
5 2014-04-04 1 2014-04-04
3 2014-04-11 2 2014-04-11
4 2014-04-16 
6 2014-04-17
7 2014-04-17 5 2014-04-17

Answer 1

SQL小提琴

select col1, date1, col2, date2
from
    t1
    full outer join
    t2 on col1 = col2
order by coalesce(date1, date2), date2;