Question

I have an SQL table like this:

id |  f1 | f2
 1 |  a  | hi
 2 |  a  | sup
 3 |  b  | hi

I need a query that grabs the rows where f2 = hi OR f2 = sup, but only if f1 has the same value in both rows. So my query would grab id 1 and id 2, but NOT 3

So basically this –

SELECT * FROM `table` WHERE (`f2` = 'hi' OR `f2` = 'sup') AND 'f1-is-the-same'

Answer 1

SELECT *
    FROM YourTable t1
        INNER JOIN YourTable t2
            ON t1.f1 = t2.f1
    WHERE t1.f2 = 'hi'
        AND t2.f2 = 'sup'