SQL check if group containes certain values of given column (ORACLE) - sql

Question

I have table audit_log with these records:
log_id | request_id | status_id
1 | 2 | 5
2 | 2 | 10
3 | 2 | 20
4 | 3 | 10
5 | 3 | 20
I would like to know if there exists request_ids having status_id 5 and 10 at the same time. So this query should return request_id = 2 as its column status_id has values 5 and 10 (request_id 3 is omitted because status_id column has only value of 10 without 5).
How could I do this with SQL?
I think I should use group by request_id, but I don't know how to check if group has status_id with values 5 and 10?
Thanks,
mismas

Answer 1

This could be a way:
/* input data */
with yourTable(log_id , request_id , status_id) as (
select 1 , 2 , 5 from dual union all
select 2 , 2 , 10 from dual union all
select 3 , 2 , 20 from dual union all
select 4 , 3 , 10 from dual union all
select 5 , 3 , 20 from dual
)
/* query */
select request_id
from yourTable
group by request_id
having count( distinct case when status_id in (5,10) then status_id end) = 2
How it works:
select request_id,
case when status_id in (5,10) then status_id end as checkColumn
from yourTable
gives
REQUEST_ID CHECKCOLUMN
---------- -----------
2 5
2 10
2
3 10
3
So the condition count (distinct ...) = 2 does the work

Answer 2

SELECT request_id
FROM table_name
GROUP BY request_id
HAVING COUNT( CASE status_id WHEN 5 THEN 1 END ) > 0
AND COUNT( CASE status_id WHEN 10 THEN 1 END ) > 0

Answer 3

To check if both values exists (without regard to additional values) you can filter before aggregation:
select request_id
from yourTable
where status_id in (5,10)
group by request_id
having count(*) = 2 -- status_id is unique
-- or
having count(distinct status_id) = 2 -- status_id exists multiple times

Answer 4

This should do it:
select
log5.*, log10.status_id
from
audit_log log5
join audit_log log10 on log10.request_id = log5.request_id
where
log5.status_id = 5
and log10.status_id = 10
order by
log5.request_id
;
Here's the output:
+ ----------- + --------------- + -------------- + -------------- +
| log_id | request_id | status_id | status_id |
+ ----------- + --------------- + -------------- + -------------- +
| 1 | 2 | 5 | 10 |
+ ----------- + --------------- + -------------- + -------------- +
1 rows
And here's the sql to set up the example:
create table audit_log (
log_id int,
request_id int,
status_id int
);
insert into audit_log values (1,2,5);
insert into audit_log values (2,2,10);
insert into audit_log values (3,2,20);
insert into audit_log values (4,3,10);
insert into audit_log values (5,3,20);