Create view with multiple case without fonction - sql

Question

Hello I have to make a view with oracle plsql but I dont know how can I done this wihtout create function:
I got this query
Hello I want to create view who use a query :
select unique tv.id , tv.homeid
case
when ht.hometype = 'A7DF56ZEF' then 0 --HOUSE
when ht.hometype = 'A7DF45ZEF' then 1 -- SMALLHOUSE
end as housetype ,
case
when tv.isfourk is null then 0
when tv.isfourk is not null then 1
end as isfourk
from hometable ht
join tvtable tv on ht.idtv = tv.id
where tv.homeid = 'KLL5FD5Z6'
This query return me result like this
tv.id tv.homeid housetype isfourk
A7844SD KLL5FD5Z6 1 0
A7944SD KLL5FD5Z6 1 0
A8044SD KLL5FD5Z6 1 0
I want to create a view using this query result. this query will be into the view.
The view will have only one row by tv.homeid , like this
Execpted result of the view:
TV.homeid STATE
KLL5FD5Z6 (0 or 1 or 2 or 3 or 4 or 5)
STATE case condition
IF ALL ROWS HAVE isfourk = 1 THEN 1
ELSE IF ALL ROWS WHERE housetype = 1 HAVE isfourk = 1 THEN 2
ELSE IF ONE OF THESE ROWS HAVE isfourk = 0 THEN 3
ELSE IF ONE OF THESE ROWS WHERE housetype = 1 HAVE isfourk = 0 THEN 4
ELSE 5
END as STATE
If you can help me please.
Thanks

Answer 1

I have summarized the query as below after clarifications. I have used your query as base and on top of that applied the case logic to build the view.
One hint , use DISTINCT instead of UNIQUE
CREATE OR REPLACE VIEW give_a_view_name
AS
SELECT homeid
, CASE
WHEN MAX(isfourk) = 1 THEN 1 --IF ALL ROWS HAVE isfourk = 1
WHEN MAX(isfourk) = 1 AND MAX(housetype) = 1 THEN 2 --IF ALL ROWS WHERE housetype = 1 HAVE isfourk = 1 THEN 2
WHEN MIN(isfourk) = 0 THEN 3 --IF ONE OF THESE ROWS HAVE isfourk = 0 THEN 3
WHEN MAX(housetype) = 1 AND MIN(isfourk) = 0 THEN 4 --IF ONE OF THESE ROWS WHERE housetype = 1 HAVE isfourk = 0 THEN 4
ELSE 5 --ELSE 5
END AS state
FROM (SELECT DISTINCT
tv.id
,tv.homeid
,CASE
WHEN ht.hometype = 'A7DF56ZEF' THEN 0 --HOUSE
WHEN ht.hometype = 'A7DF45ZEF' THEN 1 --SMALLHOUSE
END AS housetype
,CASE
WHEN tv.isfourk IS NULL THEN 0
WHEN tv.isfourk IS NOT NULL THEN 1
END AS isfourk
FROM hometable ht
JOIN tvtable tv ON ht.idtv = tv.id
WHERE tv.homeid = 'KLL5FD5Z6')
GROUP BY homeid;
Check and see if it works.