小美是一所中學的信息科技老師，她有一張 seat 座位表，平時用來儲存學生名字和與他們相對應的座位 id。

其中縱列的 id 是連續遞增的

小美想改變相鄰倆學生的座位。

你能不能幫她寫一個 SQL query 來輸出小美想要的結果呢？

示例：

+---------+---------+
|    id   | student |
+---------+---------+
|    1    | Abbot   |
|    2    | Doris   |
|    3    | Emerson |
|    4    | Green   |
|    5    | Jeames  |
+---------+---------+

假如數據輸入的是上表，則輸出結果如下：

+---------+---------+
|    id   | student |
+---------+---------+
|    1    | Doris   |
|    2    | Abbot   |
|    3    | Green   |
|    4    | Emerson |
|    5    | Jeames  |
+---------+---------+

註意：

如果學生人數是奇數，則不需要改變最後一個同學的座位。

# Write your MySQL query statement below
SELECT
 
 * FROM(
    SELECT id-1 AS id,student FROM seat WHERE id%2=0
    UNION
    SELECT id+1 AS id,student FROM seat WHERE id%2=1 AND (id+1) <= (SELECT COUNT(*) FROM seat)
    UNION
    SELECT id AS id,student FROM seat WHERE id%2=1 AND (id+1) > (SELECT COUNT(*) FROM seat)
) AS T1
ORDER BY id ASC

力扣——換座位（數據庫的題