postgres 9.4将多个分隔符上的列拆分为新列

Question

参考这个SO问题

Postgres unnest

有没有办法将基于2个分隔符的列拆分为4列？

如果我有一个包含此数据的列。

11-3-1-4 $72390.00

我将如何制作

col1    col2    col3    col4    col5
11      3       1       4       72390.00

另外我应该保留原始列吗？

Answer 1

string_to_array()可用于此：

select c1[1] as col1, 
       c1[2] as col2, 
       c1[3] as col3,
       c1[4] as col4,
       substr(col5, 2) as col5
from (
   select string_to_array((string_to_array(the_column, ' '))[1], '-') as c1,
          (string_to_array(the_column, ' '))[2] as col5
   from the_table
) t