使用 MySQL 查询按降序获取固定数量的结果
mysqlmysqli database
对于降序结果，使用 DESC。但是，LIMIT 用于获取固定数量的记录 −
select *from yourTableName order by yourColumnName DESC LIMIT yourLimitNumber;
首先我们创建一个表 −
mysql> create table DemoTable (Id int, Name varchar(100)); Query OK, 0 rows affected (0.73 sec)
示例
使用 insert 命令在表中插入一些记录 −
mysql> insert into DemoTable values(100,'John'); Query OK, 1 row affected (0.11 sec) mysql> insert into DemoTable values(101,'Chris'); Query OK, 1 row affected (0.18 sec) mysql> insert into DemoTable values(102,'Robert'); Query OK, 1 row affected (0.23 sec) mysql> insert into DemoTable values(103,'Bob'); Query OK, 1 row affected (0.18 sec) mysql> insert into DemoTable values(104,'Adam'); Query OK, 1 row affected (0.20 sec) mysql> insert into DemoTable values(105,'James'); Query OK, 1 row affected (0.18 sec)
使用 select 语句显示表中的所有记录 −
mysql> select *from DemoTable;
输出
+------+--------+ | Id | Name | +------+--------+ | 100 | John | | 101 | Chris | | 102 | Robert | | 103 | Bob | | 104 | Adam | | 105 | James | +------+--------+ 6 rows in set (0.00 sec)
按降序获取固定数量的记录 −
mysql> select *from DemoTable order by Name DESC LIMIT 3;
输出
+------+--------+ | Id | Name | +------+--------+ | 102 | Robert | | 100 | John | | 105 | James | +------+--------+ 3 rows in set (0.00 sec)
