显示 MySQL 表中的随机行
mysqlmysqli database
要显示单个随机行，请使用带 LIMIT 的 RAND()。此处，LIMIT 用于获取记录数，因为我们只需要一行，因此使用 LIMIT 1。让我们首先创建一个表 −
mysql> create table DemoTable ( Id int NOT NULL AUTO_INCREMENT PRIMARY KEY, Name varchar(50), Quote text ); Query OK, 0 rows affected (0.71 sec)
使用 insert 命令在表中插入一些记录 −
mysql> insert into DemoTable(Name,Quote) values('Chris','MySQL is a relational database');
Query OK, 1 row affected (0.11 sec)
mysql> insert into DemoTable(Name,Quote) values('Robert','Java is an Object Oriented Programming Language');
Query OK, 1 row affected (0.17 sec)
mysql> insert into DemoTable(Name,Quote) values('Mike','C is a Procedural Language');
Query OK, 1 row affected (0.15 sec)
mysql> insert into DemoTable(Name,Quote) values('David','Hibernate and spring is a framework');
Query OK, 1 row affected (0.15 sec)
使用 select 语句显示表中的所有记录 −
mysql> select *from DemoTable;
这将产生以下输出 −
+----+--------+-------------------------------------------------+ | Id | Name | Quote | +----+--------+-------------------------------------------------+ | 1 | Chris | MySQL is a relational database | | 2 | Robert | Java is an Object Oriented Programming Language | | 3 | Mike | C is a Procedural Language | | 4 | David | Hibernate and spring is a framework | +----+--------+-------------------------------------------------+ 4 rows in set (0.00 sec)
以下查询用于显示 MySQL 表中的随机数 −
mysql> select Id,Name,Quote from DemoTable order by rand() limit 1;
这将产生以下输出 −
+----+------+----------------------------+ | Id | Name | Quote | +----+------+----------------------------+ | 3 | Mike | C is a Procedural Language | +----+------+----------------------------+ 1 row in set (0.00 sec)
