Re: How can I select rows by comparing an array data type column with multiple values ?

On 02/06/2014 11:54, Arup Rakshit wrote:
> Hi,
>
> Suppose, I have a table as below :-
>
> id |    title     |    content     |       tags
> ----+--------------+----------------+-------------------
>   1 | sample post  | lorem ipsum    | {apple,orange}
>   2 | another post | fruits are bad | {apple,hamburger}
>   3 | third post   | foo bar            | { banana, lemon }
>   4 | third post   | foo baz           | { watermelon, lemon }
>
> Now I want to select all rows, for which tags will having either one or
> all value from the this array [apple,banana] ? how should I write the
> query using such a set ?

You can use the array "overlap" operator, something like this:

  SELECT .... WHERE tags && ARRAY['apple', 'banana'];

See here:

  http://www.postgresql.org/docs/9.3/static/functions-array.html

Ray.


--
Raymond O'Donnell :: Galway :: Ireland
rod@iol.ie