Plusieurs critères dans la même colonne

Question

Comment faire une recherche avec plusieurs critères dans la même colonne. T1 a les identifiants.

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 

Sortie:

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 

Est-ce correct requête? N'apporte-t-il pas aussi t2_id = 5 parce que # 5 correspond à apple et kiwi bien que Apple soit en double?

Answer 1

Vous n'avez pas besoin de rejoindre t1 et vous avez besoin COUNT(DISTINCT column_name):

SQL Fiddle

Oracle 11g R2 schéma configuration:

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; 

Requête 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 | 

Requête 2:

Vous pouvez aussi le faire en utilisant les 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 |