Question

Think about a table like this

ID     Value    
100    1    
100    3    
101    1    
101    4    
102    2    
102    5    
103    2    
103    4    
104    1    
104    3    
105    2    
105    5

The problem is, if I give values 2 and 5 I should get 102 and 105 which both 102 and 105 are having values 2 and 5 at the same time or if I give values 1 and 3 I should get 100 and 104.

How can I do this with only one sql command? I need a query as light as possible.

and using UNION, INTERSECTION or NESTED SQLs, which one is faster, slower, heavier e.t.c?

Thanks in advance
Ergec

Answer 1

There’s lots of solutions. Addition to the Jhonny’s solution, you can use a join

SELECT DISTINCT t1.id
FROM table t1, table t2
WHERE t1.id = t2.id
  AND t1.value = 2
  AND t2.value = 5

OR use Intersect

SELECT id FROM table WHERE value = 2

INTERSECT

SELECT id FROM table WHERE value = 5