本文介绍了如何在postgres中从字符串末尾应用split_part函数的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
我想分割下面的字符串(在单列中显示),并以空格隔开。对于下面的3行,我想要以下输出
I want to split the below string (present in a single column) separated by spaces from the end. For the below 3 rows, I want the following output
输出:
Country STATE STREET UNIT
AU NSW 2 12
AU NSW 51
AU NSW 12
输入:
12 2 NOELA PLACE ST MARYS NSW 2760 AU
51 MALABAR ROAD SOUTH COOGEE NSW 2034 AU
12 LISTER STREET WINSTON HILLS NSW 2153 AU
INPUT:
12 2 NOELA PLACE ST MARYS NSW 2760 AU
51 MALABAR ROAD SOUTH COOGEE NSW 2034 AU
12 LISTER STREET WINSTON HILLS NSW 2153 AU
推荐答案
当然,这种条件解析是不可靠:
of course such conditional parsing is not reliable:
t=# with v(a) as( values('12 2 NOELA PLACE ST MARYS NSW 2760 AU')
,('51 MALABAR ROAD SOUTH COOGEE NSW 2034 AU')
,('12 LISTER STREET WINSTON HILLS NSW 2153 AU')
)
select reverse(split_part(reverse(a),' ',1)), reverse(split_part(reverse(a),' ',3)), case when split_part(a,' ',2) ~ '\d' then split_part(a,' ',2) end st, split_part(a,' ',1) un from v;
reverse | reverse | st | un
---------+---------+----+----
AU | NSW | 2 | 12
AU | NSW | | 51
AU | NSW | | 12
(3 rows)
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