How to data show Data Row Column in Postgresql? - postgresql

Question

Here is my data and query. I want row data show in columns... Can someone help me to modify the query? I am using PostgreSQL queries.
select
ss.name, ip.product_name, ssr.quantity
from
services_servicerecipe ssr
inner join
services_service ss on ssr.service_id = ss.id
inner join
inventory_product ip on ssr.product_id = ip.id
order by
ss.name
Output:
Service_name | Product_name | Quantity
-------------+------------------+-----------
Balayage | 7.3-revlon | 2
Balayage | 701-revlon | 1
I want it to look like this
Service_name | Product_name | Quantity | Product_name | Quantity
-------------+-------------------+--------------+------------------+----------
Balayage | 7.3-revlon | 2 | 701-revlon | 1

Answer 1

Here is a pivot option, using ROW_NUMBER:
with cte as (
select ss.name, ip.product_name, ssr.quantity,
row_number() over (partition by ss.name order by ip.product_name) rn
from services_servicerecipe ssr
inner join services_service ss on ssr.service_id = ss.id
inner join inventory_product ip on ssr.product_id = ip.id
)
select
name,
max(case when rn = 1 then product_name end) as product1,
max(case when rn = 1 then quantity end) as quantity1,
max(case when rn = 2 then product_name end) as product2,
max(case when rn = 2 then quantity end) as quantity2
from cte
group by name;