如何将记录限制为仅MySQL中的最后五个结果
仅获取以下的最后五条记录是语法-
select *from yourTableName order by yourColumnName DESC LIMIT 5;
让我们首先创建一个表-
mysql> create table DemoTable820( Id int NOT NULL AUTO_INCREMENT PRIMARY KEY, CustomerName varchar(100) );
使用插入命令在表中插入一些记录-
mysql> insert into DemoTable820(CustomerName) values('Chris');
mysql> insert into DemoTable820(CustomerName) values('Robert');
mysql> insert into DemoTable820(CustomerName) values('David');
mysql> insert into DemoTable820(CustomerName) values('Bob');
mysql> insert into DemoTable820(CustomerName) values('Carol');
mysql> insert into DemoTable820(CustomerName) values('Adam');使用select语句显示表中的所有记录-
mysql> select *from DemoTable820;
这将产生以下输出-
+----+--------------+ | Id | CustomerName | +----+--------------+ | 1 | Chris | | 2 | Robert | | 3 | David | | 4 | Bob | | 5 | Carol | | 6 | Adam | +----+--------------+ 6 rows in set (0.00 sec)
以下是将记录限制为仅最后五个结果的查询-
mysql> select *from DemoTable820 order by Id DESC LIMIT 5;
这将产生以下输出-
+----+--------------+ | Id | CustomerName | +----+--------------+ | 6 | Adam | | 5 | Carol | | 4 | Bob | | 3 | David | | 2 | Robert | +----+--------------+ 5 rows in set (0.00 sec)