如何在Postgresql中將行拆分成許多行

Question

我有一張有兩列的表：ID和汽車。 的樣本數據是這樣的：

ID | Cars 
----------------- 
1 | opel, honda and land rover 
2 | ford and porshe, damaged 
3 | volkswagen 
4 | opel, seat, damaged 

我想它拆分成：

ID | Cars 
----------------- 
1 | opel 
1 | honda 
1 | land rover 
2 | ford 
2 | porshe, damaged 
3 | volkswagen 
4 | opel 
4 | seat, damaged 

因此分隔符and或,但不, damaged 如何使用正則表達式來它在PostgreSQL的分裂？

編輯：

以及如何使它工作的記錄，像

5 | land rover and opel, and ford 
6 | ford; mazda and toyota 

Answer 1

可以使用regexp_split_to_table與受損負先行;

SELECT "ID", regexp_split_to_table("Cars", '((, (?!damaged))| and)') "Cars" 
FROM mytable; 

ID |  Cars 
----+----------------- 
    1 | opel 
    1 | honda 
    1 | land rover 
    2 | ford 
    2 | porshe, damaged 
    3 | volkswagen 
    4 | opel 
    4 | seat, damaged 
(8 rows) 

An SQLfiddle to test with。

編輯：對於你的新例子，正則表達式不得不稍微調整;

SELECT "ID", regexp_split_to_table("Cars", '(([,;] (?!damaged))|[,;]? and)') "Cars" 
FROM mytable; 

Another SQLfiddle。