從表中選擇元素

Question

我有這個查詢

SELECT
    equipe_id
FROM
    user
GROUP BY
    equipe_id
HAVING
    COUNT(*) >= 5

它返回1和3。

我想使用上一個查詢來使用下一個查詢

SELECT
    name,
    location
FROM
    equipe
WHERE
    equipe_id IN ??? previous query result (1,3) ???

我希望這是有道理的。 謝謝

Answer 1

SELECT name
     , location 
  FROM equipe 
 WHERE equipe_id in (SELECT equipe_id FROM user GROUP BY equipe_id HAVING COUNT(*) >= 5);

Answer 2

我們也可以嘗試通過加入子查詢來做到這一點：

SELECT e1.name, e1.location
FROM equipe e1
INNER JOIN
(
    SELECT equipe_id
    FROM user
    GROUP BY equipe_id
    HAVING COUNT(*) >= 5
) e2
    ON e1.equipe_id = e2.equipe_id;

Answer 3

或者，也可以不使用內部子查詢來完成此操作，如下所示：

SELECT
    e.name,
    e.location
FROM
    equipe AS e
INNER JOIN
    user AS u ON u.equipe_id = e.equipe_id
GROUP BY
    e.equipe_id, e.name, e.location
HAVING
    COUNT(*) >= 5