Oracle- count the number rows based on a condition - oracle

Question

I want to create a 'ticket' which counts the number of passes for each ID. When we have a gold pass on any of the ID, this means the pass is applied to all those in booking. So for this example, we want to count 5. For the other pass_codes, we want to simply count the number of passes and exclude those that are nulls. I have an expected output below.
Say I have this data:
Passes
ID | GuestID | Pass_code
----------------------------
100 | 001 | Bronze
100 | 002 | Bronze
101 | 103 | Gold
101 | 104 | NULL
101 | 105 | NULL
101 | 106 | NULL
101 | 107 | NULL
102 | 208 | Silver
103 | 209 | Steel
103 | 210 | Steel
103 | 211 | NULL
Passengers
ID | Passengers
-----------------
100 | 2
101 | 5
102 | 1
103 | 3
I want to count then create a ticket in the output of:
ID 100 | 2 pass (bronze)
ID 101 | 5 pass (because it is gold, we count all passengers)
ID 102 | 1 pass (silver)
ID 103 | 2 pass (steel) (2 passes rather than than 3 as we just want to count only the passes for steel, bronze silver)
I want to do something like this, but as a combined query.
DECLARE #ID = 101; -- i will want to pass in IDs
-- for gold, we want to count all passengers when the gold pass is on
SELECT pp.Passengers
FROM passes
JOIN Passengers pp ON p.ID = pp.ID
WHERE p.pass_code IN'%gold%'
AND PP.id = #id
-- for bronze, silver and steel
SELECT
count(p.ID)
FROM Passes
WHERE p.ID = #id
AND P.pass_code IN ('Bronze', 'silver', 'steel') -- Dont want to check based on NUlls as this may chnage to something else.
)
Any help or advice would be much appreciated.

Answer 1

Does this work for you?
with Passes as (
select 100 as id, 001 as guestid, 'Bronze' as passcode from dual union all
select 100 as id, 002 as guestid, 'Bronze' as passcode from dual union all
select 101 as id, 103 as guestid,'Gold' as passcode from dual union all
select 101 as id, 104 as guestid, NULL as passcode from dual union all
select 101 as id, 105 as guestid, NULL as passcode from dual union all
select 101 as id, 106 as guestid, NULL as passcode from dual union all
select 101 as id, 107 as guestid, NULL as passcode from dual union all
select 102 as id, 208 as guestid, 'Silver' as passcode from dual union all
select 103 as id, 209 as guestid, 'Steel' as passcode from dual union all
select 103 as id, 210 as guestid, 'Steel' as passcode from dual union all
select 103 as id, 211 as guestid, NULL as passcode from dual
)
SELECT
id,passcode,count(ID)
FROM Passes
where passcode is not null and passcode<>'Gold'
group by id,passcode
union all
SELECT
id,'Gold',count(ID)
FROM Passes
where id in
(
select id from Passes where passcode='Gold'
)
group by id
order by id
result:
100 Bronze 2
101 Gold 5
102 Silver 1
103 Steel 2

Answer 2

If I understand your question right the query should be like the following
** The table
create table test (ID number, GuestId number, Pass_code varchar2(10));
insert into test values(100,001,'Bronze');
insert into test values(100,002,'Bronze');
insert into test values(101,103,'Gold');
insert into test values(101,104,NULL);
insert into test values(101,105,NULL);
insert into test values(101,106,NULL);
insert into test values(101,107,NULL);
insert into test values(102,208,'Silver');
insert into test values(103,209,'Steel');
insert into test values(103,210,'Steel');
insert into test values(103,211,NULL);
commit;
SQL> select * from test order by 1,2;
ID GUESTID PASS_CODE
---------- ---------- ------------------------------
100 1 Bronze
100 2 Bronze
101 103 Gold
101 104
101 105
101 106
101 107
102 208 Silver
103 209 Steel
103 210 Steel
103 211
11 rows selected.
** The query
WITH PASSES AS (
SELECT T1.ID,T1.PASS_CODE, COUNT(T2.ID) QUANTITY FROM TEST T1, TEST T2
WHERE T1.PASS_CODE='Gold' AND T1.ID=T2.ID
GROUP BY T1.ID,T1.PASS_CODE
UNION ALL
SELECT ID,PASS_CODE, COUNT(*) QUANTITY FROM TEST
WHERE PASS_CODE IS NOT NULL AND
PASS_CODE != 'Gold'
GROUP BY ID,PASS_CODE)
SELECT ID, QUANTITY || ' (' || PASS_CODE || ')' RESULT FROM PASSES
ORDER BY ID;
** Result
ID RESULT
---------- --------------------
100 2 (Bronze)
101 5 (Gold)
102 1 (Silver)
103 2 (Steel)