Welcome to WuJiGu Developer Q&A Community for programmer and developer-Open, Learning and Share
Welcome To Ask or Share your Answers For Others

Categories

0 votes
989 views
in Technique[技术] by (71.8m points)

sql - Reverse in Oracle this path z/y/x to x/y/z

How would I do in a SELECT query to reverse this path :

z/y/x 

for

x/y/z

where / is the delimiter and where there can be many delimiters in a single line

ex: select (... z/y/x/w/v/u ...) reversed_path from ...
See Question&Answers more detail:os

与恶龙缠斗过久,自身亦成为恶龙;凝视深渊过久,深渊将回以凝视…
Welcome To Ask or Share your Answers For Others

1 Answer

0 votes
by (71.8m points)

You can get your result by connecting the reverted components, then reverting the resulting string again. Just make sure you strip your starting separator and put it on the other side:

SELECT '/' || REVERSE(LTRIM(SYS_CONNECT_BY_PATH(REVERSE(x), '/'), '/') AS reversed_path
...

与恶龙缠斗过久,自身亦成为恶龙;凝视深渊过久,深渊将回以凝视…
Welcome to WuJiGu Developer Q&A Community for programmer and developer-Open, Learning and Share
...