Question

想象一下下表

DEPARTURE_ID    ARRIVE_ID   ORDER
-------------   ---------   -----
1               3           1
2               3           2
3               (null)      3
10              12          1
11              13          2
12              15          3
13              15          4
14              15          5
15              (null)      6
25              27          1
26              27          2 
27              (null)      3

我想保留以前的arrival_id

连接的departure_id

在oracle11g中，我这样做

样本表

create table dep_arrives ( departureid, arrriveid, ord) as
    select  '1',  '3',  1 from dual union all
    select  '2',  '3',  2 from dual union all
    select  '3',  null, 3 from dual union all
    select  '10', '12', 1 from dual union all
    select  '11', '13', 2 from dual union all
    select  '12', '15', 3 from dual union all
    select  '13', '15', 4 from dual union all
    select  '14', '15', 5 from dual union all
    select  '15', null, 6 from dual union all
    select  '25', '27', 1 from dual union all
    select  '26', '27', 2 from dual union all
    select  '27', null, 3 from dual
;

选择陈述

select departureid
from  dep_arrives
start with ord = 1
connect by departureid = prior arrriveid

结果

DEPARTURE_ID
1
3
10
12
15
25
27

我知道在netezza中没有连接的开始，所以我正在寻找netezza sql的解决方法。

提前致谢。

在netezza开始与他们联系

0 个答案: