Mauro Bertoli wrote:
Hi, I've a field that contain values-comma-separated
like
A) 1;2;3;;5 -- ;2;;4;5
but also
B) 12;34;18
how I can get the max value?
For A I tried:
SELECT max(array_upper(string_to_array(answer,';'),1))
FROM values;
and work fine, but for B case I don't find a solution
like
SELECT max(string_to_array(answer,';')) FROM values;
Any ideas?
Thanks for any hint
You could try rearranging the values into rows, like so:
CREATE OR REPLACE FUNCTION text2rows (TEXT,TEXT) RETURNS SETOF TEXT AS $$
SELECT (string_to_array($1, $2))[x.i]
FROM generate_series(1,array_upper(string_to_array($1,$2),1)) AS x(i);
$$ language sql strict;
select max(val)
from (SELECT text2rows(answer,';') as val FROM answer) as t;
---------------------------(end of broadcast)---------------------------
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