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(at)iol(dot)ie