MySQL 如何选择最后两行

要选择最后两行，请使用ORDER BY DESC LIMIT 2。

首先让我们创建一个表 –

mysql>> create table DemoTable763 (
   Id int NOT NULL AUTO_INCREMENT PRIMARY KEY,
   FirstName varchar(100)
);
Query OK, 0 rows affected (0.57 sec)

使用插入命令向表中插入一些记录 –

mysql>> insert into DemoTable763(FirstName) values('John');
Query OK, 1 row affected (0.19 sec)
mysql>> insert into DemoTable763(FirstName) values('Sam');
Query OK, 1 row affected (0.12 sec)
mysql>> insert into DemoTable763(FirstName) values('Carol');
Query OK, 1 row affected (0.14 sec)
mysql>> insert into DemoTable763(FirstName) values('David');
Query OK, 1 row affected (0.13 sec)
mysql>> insert into DemoTable763(FirstName) values('Bob');
Query OK, 1 row affected (0.13 sec)

使用select语句从表中显示所有记录 –

mysql>> select *from DemoTable763;

这将产生以下输出 –

+----+-----------+
| Id | FirstName |
+----+-----------+
|  1 | John      |
|  2 | Sam       |
|  3 | Carol     |
|  4 | David     |
|  5 | Bob       |
+----+-----------+
5 rows in set (0.00 sec)

以下是在MySQL中选择最后两行的查询 –

mysql>> select *from DemoTable763 order by Id DESC LIMIT 2;

这将产生以下输出 –

+----+-----------+
| Id | FirstName |
+----+-----------+
|  5 | Bob       |
|  4 | David     |
+----+-----------+
2 rows in set (0.00 sec)

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