Using same column multiple times in WHERE clause

Question

I have a following table structure.

USERS

PROPERTY_VALUE

PROPERTY_NAME

USER_

Answer 1

Assuming you want to select all the fields in the USERS table

SELECT u.* 
FROM USERS u
INNER JOIN 
(
    SELECT USERS.id as user_id, COUNT(*) as matching_property_count
    FROM USERS
    INNER JOIN (
        SELECT m.user_id, n.name as property_name, v.value
        FROM PROPERTY_NAME n
        INNER JOIN PROPERTY_VALUE v ON n.id = v.property_name_id
        INNER JOIN USER_PROPERTY_MAP m ON m.property_value_id = v.property_value_id
        WHERE  (n.id = @property_id_1 AND v.value = @property_value_1) -- Property Condition 1
            OR (n.id = @property_id_2 AND v.value = @property_value_2) -- Property Condition 2
            OR (n.id = @property_id_3 AND v.value = @property_value_3) -- Property Condition 3
            OR (n.id = @property_id_N AND v.value = @property_value_N) -- Property Condition N
    ) USER_PROPERTIES ON USER_PROPERTIES.user_id = USERS.id
    GROUP BY USERS.id
    HAVING COUNT(*) = N     --N = the number of Property Condition in the WHERE clause
    -- Note : 
    -- Use HAVING COUNT(*) = N if property matches will be "MUST MATCH ALL"
    -- Use HAVING COUNT(*) > 0 if property matches will be "MUST MATCH AT LEAST ONE"
) USER_MATCHING_PROPERTY_COUNT ON u.id = USER_MATCHING_PROPERTY_COUNT.user_id