Retrieving based on specific condition - oracle

Question

I have a little complex requirement on couple of tables which I am finding hard to crack.
There are 2 tables. TableA and TableB
TableA has a structure like:
-------------------------------------
ID COL1 COL2 CAT
-------------------------------------
1 RecAA RecAB 3
2 RecBA RecBB 3
3 RecCA RecCB 2
4 RecDA RecDB 2
5 RecEA RecEB 1
-------------------------------------
TableB has a structure like:
-----------------
COL3 TYPE
-----------------
RecAA 10
RecAA 11
RecAA 12
RecAB 10
RecAB 11
RecAB 12
RecAB 13
RecAB 14
RecBA 10
RecBA 11
RecBA 14
RecBA 15
RecBB 10
-----------------
Requirements:
Records in TableA should have CAT = 3.
Either COL1 or COL2 of TableA should be available in COL3 of TableB.
COL3 should definitely have TYPE in 10,11,12 and should have only that TYPE.
i.e As per the above requirements,
Of the records available in TableA, records with ID 1 and 2 have CAT = 3 in TableA
Both the records have atleast only value in COL3 of TableB. (Record with ID 1 in TableA has both COL1 and COL2 in TableB and record with ID 2 in TableA has COL1 in TableB)
RecAA record has Type 10,11,12 and only 10,11,12. So doesnt matter if RecAB has 10,11,12 or not. But RecBA and RecBB both does not have 10,11,12 types.
Therefore the result should be:
-------------------------------------
ID COL1 COL2 CAT
-------------------------------------
1 RecAA RecAB 3
-------------------------------------
What I tried:
WITH TEMP AS (SELECT COL3 FROM TableB GROUP BY COL3 HAVING SUM(CASE WHEN TYPE IN ('10','11','12') THEN 1 ELSE 0 END) = 0)
SELECT S.ID, S.COL1, S.COL2, S.CAT FROM TableA S
INNER JOIN TEMP T ON S.COL1 = T.COL3
WHERE S.CAT = 3;
Can someone please help on achieving this?

Answer 1

I think you're almost there, it's just your row selection in the CTE that seems problematic, and I think you need an OR:
WITH TEMP AS (
SELECT COL3
FROM TableB
GROUP BY COL3
HAVING SUM(POWER(2, TYPE - 10)) = 7 AND COUNT(*) = 3
)
SELECT
S.ID, S.COL1, S.COL2, S.CAT
FROM
TableA S
INNER JOIN TEMP T ON S.COL1 = T.COL3 OR S.COL2 = T.COL3
WHERE
S.CAT = 3;
I've subtracted 10 from each of your TYPEs to turn your 10,11,12 into 0,1,2 and then used POWER to turn them into 1, 2 and 4 which uniquely sum to 7 - (in other words your 10,11,12 became 2^(10-10), 2^(11-10) and 2^(12-10) which are 1, 2 and 4.. Which must then sum to 7).
I also mandate that there be a count of 3; the only way to get to 7 with three numbers that are powers of 2 is to have 1+2+4 which guarantees that 10,11,12 are present initially. If anything was missing, extra or repeated it wouldn't be 3 numbers that sum to 7
I think RecAB is excluded because even though it has 10,11,12 it also has 13,14 which cause it to be excluded..
You also seemed to be saying that COL3 should be present in either COL1 or COL2 of table A

Answer 2

You can use listagg analytic version to turn TYPE column into type_in_list column like below :
With temp_TableB (COL3, type_in_list) as (
SELECT distinct COL3, listagg(TYPE, ',') within group (order by TYPE)over(partition by COL3)
FROM TableB
)
select tA.*
--, tb.*
from tableA tA
INNER JOIN temp_TableB tB on (tA.COL1 = tB.COL3 or tA.COL2 = tB.COL3)
Where tA.CAT = 3
AND tB.TYPE_IN_LIST = '10,11,12'
;