基于列的独特行

Question

我正在尝试执行MySQL查询，我有2列id和代码，id是自动生成的。我绑的是下面的。我得到了我想要实现的目标。我尝试了太多查询组合Unique，Distinct等。

Query: "SELECT DISTINCT(code) FROM table GROUP BY code ORDER BY id DESC;"
id  code
1   0000
2   0000
3   0001
4   0001
5   0001
6   0002
7   0003

What i am trying to do get

id  code
2   0000
5   0001
6   0002
7   0003

Answer 1

SELECT * FROM `table` WHERE id IN (SELECT MAX(id) FROM `table` GROUP BY `code` ORDER BY `id`)

对于DESC订单，请使用：

SELECT * FROM `table` WHERE id IN (SELECT MAX(id) FROM `table` GROUP BY `code`) ORDER BY `id` DESC