How get specific rows in grouped result - sql

Question

i need to group some data but because there are 4 store images , sql query return 4 result for every store. How can i get only one for a store by using sql query ?
select s.name,si.SHOP_IMG_PATH,count(*) amount from stab t
inner join shop s on (s.shop_id = t.shop_id)
inner join SHOP_IMG si on (s.shop_id= si.SHOP_ID)
where t.acct_id = 111 and t.CR_DATE >= sysDate - 1
group by s.name,si.SHOP_IMG_PATH
order by 3 desc,1 asc
As you see below image there a re 4 images so query can give random image

Answer 1

You are grouping by s.name, si.SHOP_IMG_PATH it will consider all possible combination of s.name, si.SHOP_IMG_PATH as separate you need to keep group by only s.name
Try this
SELECT a.NAME, a.PATH, a.AMOUNT
FROM (select
s.name AS 'NAME', si.SHOP_IMG_PATH AS 'PATH', count(*) AS 'AMOUNT',
ROW_NUMBER() OVER(PARTITION BY s.name
ORDER BY type si.SHOP_IMG_PATH) AS rk
from
stab t
inner join shop s on (s.shop_id = t.shop_id)
inner join SHOP_IMG si on (s.shop_id= si.SHOP_ID)
where t.acct_id = 111 and t.CR_DATE >= sysDate - 1
group by s.name
order by 3 desc,1 asc) a
WHERE a.rk = 1;
Alternative
You will get result but this is just a workaround and easy alternative to your problem but not a good one.
select s.name AS 'NAME', min(si.SHOP_IMG_PATH) AS 'PATH', count(*) AS 'AMOUNT',
from
stab t
inner join shop s on (s.shop_id = t.shop_id)
inner join SHOP_IMG si on (s.shop_id= si.SHOP_ID)
where t.acct_id = 111 and t.CR_DATE >= sysDate - 1
group by s.name
order by 3 desc,1 asc
This second query will return result as per your need

Answer 2

group by s.name, si.SHOP_IMG_PATH
You're telling it to differentiate them according to SHOP_IMG_PATH. Hence, it shows 4 results, one for each of those.
You'll have to drop SHOP_IMG_PATH from the select clause, if you won't let it use it.
Edit
Got your comment. What you're looking for is random aggregation. This is achieved diferently on different SQL engines. Google around for the one you're using.
If it's Oracle, as indicated by the question tag, here

Answer 3

I solved my problem by using below query,
select s.name,t.shop_id,(select min(SHOP_IMG_PATH) from SHOP_IMG si where shop_id =t.shop_id),count(*) amount from stab t
inner join shop s on (s.shop_id = t.shop_id)
where t.acct_id = 111 and t.CR_DATE >= sysDate - 1
group by s.name,t.shop_id
order by 4 desc,1 asc