mysql - この特定のクエリを記述するより良い方法はありますか?

Question

SELECT (res.phone_number_count + res.computer_count) AS user_count FROM (
    SELECT COUNT(DISTINCT phone_number_id) AS phone_number_count, COUNT(DISTINCT computer_id) AS computer_count
    FROM opinions
    WHERE case_id = 1
) AS res;

一意の phone_number_ids と computer_ids の両方の数を取得しようとしています。

Answer 1

どうですか：

SELECT COUNT(DISTINCT phone_number_id) + COUNT(DISTINCT computer_id) AS user_count
FROM opinions
WHERE case_id = 1