Reputation: 489
I have got 2 tables "animal_breeds" and "ztmp.ztmp_509810_anims_out". In "animals breed" every animal has key and breed name and percentage. Few animals might have 2 different breeds with different percentage. Now based on the animals key in "animals_breeds" i want to update "ztmp.ztmp_509810_anims_out"
i am using this code which i know is wrong
update ztmp.ztmp_509810_anims_out
set
alt_id1 = ab.breed
,alt_id2 = pcnt
,alt_id3 = ab.breed
,alt_id4 = pcnt
,alt_id5 = ab.breed
,alt_id6 = pcnt
,alt_id7 = ab.breed
,alt_id8 = pcnt
from animal_breeds ab
where ab.soc_code = ztmp_509810_anims_out.soc_code and ab.animals_key = ztmp_509810_anims_out.animals_key
and ab.soc_code = 'AUNDB';
could i use a for loop inside an update statement?
Upvotes: 2
Views: 31
Reputation: 248305
UPDATE ztmp.ztmp_509810_anims_out AS z
SET soc_code = q.soc_code,
animals_key = q.animals_key,
alt_id1 = breeds[1],
alt_id2 = pcnts[1],
alt_id3 = breeds[2],
alt_id4 = pcnts[2]
FROM (SELECT soc_code, animals_key,
array_agg(breed) breeds, array_agg(pcnt) pcnts
FROM animal_breeds
GROUP BY soc_code, animals_key
) q
WHERE z.soc_code = q.soc_code
AND z.animals_key = q.animals_key;
If there can be more than 2 breeds per animals_key
, add breeds[3]
and pcnts[3]
and so on.
Upvotes: 3