Multiple criteria on the same column - sql

Question

How do I search with multiple criteria on the same column.
T1 has the IDs.
T2:
ID T1_ID(FK) Value
1 1 Apple
2 1 Orange
3 1 Kiwi
4 2 Orange
5 2 Kiwi
6 3 Pear
7 3 Berry
8 3 Orange
9 4 Apple
10 5 Apple
11 5 Apple
12 5 Kiwi
Output:
T2_ID(FK) Value
1 Apple
1 Orange
1 Kiwi
select t2.t1_id, t2.value
from t1, t2
where t1.id = t2.id
and t2.value in ('Apple','Orange','Kiwi')
group by t1.id having count(t2.value)=3
Is this query correct? Doesn't it also bring t2_id = 5 because #5 matches with apple and kiwi although apple is duplicate?

Answer 1

You don't need to join t1 and you need COUNT(DISTINCT column_name):
SQL Fiddle
Oracle 11g R2 Schema Setup:
CREATE TABLE t2 (ID, T1_ID, Value ) AS
SELECT 1, 1, 'Apple' FROM DUAL UNION ALL
SELECT 2, 1, 'Orange' FROM DUAL UNION ALL
SELECT 3, 1, 'Kiwi' FROM DUAL UNION ALL
SELECT 4, 2, 'Orange' FROM DUAL UNION ALL
SELECT 5, 2, 'Kiwi' FROM DUAL UNION ALL
SELECT 6, 3, 'Pear' FROM DUAL UNION ALL
SELECT 7, 3, 'Berry' FROM DUAL UNION ALL
SELECT 8, 3, 'Orange' FROM DUAL UNION ALL
SELECT 9, 4, 'Apple' FROM DUAL UNION ALL
SELECT 10, 5, 'Apple' FROM DUAL UNION ALL
SELECT 11, 5, 'Apple' FROM DUAL UNION ALL
SELECT 12, 5, 'Kiwi' FROM DUAL;
Query 1:
select t1_id,
LISTAGG( value, ',' ) WITHIN GROUP ( ORDER BY value ) As "values"
from t2
where value in ('Apple','Orange','Kiwi')
group by t1_id
having count( DISTINCT value) = 3
Results:
| T1_ID | values |
|-------|-------------------|
| 1 | Apple,Kiwi,Orange |
Query 2:
You can also do it using collections:
CREATE TYPE STRINGLIST IS TABLE OF VARCHAR2(10);
/
SELECT *
FROM (
SELECT t1_id,
CAST( COLLECT( value ORDER BY value ) AS STRINGLIST ) AS "values"
FROM t2
GROUP BY t1_id
)
WHERE STRINGLIST( 'Apple', 'Kiwi', 'Orange' ) SUBMULTISET OF "values"
Results:
| T1_ID | values |
|-------|-------------------|
| 1 | Apple,Kiwi,Orange |