postgresql-sort array by words in each elements

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There is string array

SQL

ARRAY['CAT','CAT DOG CAT','DOG Cat']

Now i want to sort this array on count of words in each element. I have tried but cannot get any success.

I want this output

SQL

ARRAY['CAT DOG CAT','DOG CAT','Cat']

How i can do this?

Posted 1-Aug-13 0:31am

askquez

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Maciej Los · Answer 1 · 2013-08-01T01:04:00

Solution 1

I'm not sure, but it would be something like that:

SQL

SELECT *
FROM (
     SELECT unnest(ARRAY['CAT','CAT DOG CAT','DOG Cat']) AS Aminals, unnest(ARRAY[3,1,2]) AS SortOrder
     ) AS foo
ORDER BY SortOrder

See here:
8.14. Arrays[^]
9.17. Array Functions and Operators[^]

Posted 1-Aug-13 1:04am

Maciej Los