显示来自MySQL表的随机行
要显示单个随机行，请RAND()与LIMIT一起使用。此处，LIMIT用于获取记录数，因为我们只需要一行，因此请使用LIMIT1。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 );
使用插入命令在表中插入一些记录-
mysql> insert into DemoTable(Name,Quote) values('Chris','MySQL is a relational database');
mysql> insert into DemoTable(Name,Quote) values('Robert','Java is an Object Oriented Programming Language');
mysql> insert into DemoTable(Name,Quote) values('Mike','C is a Procedural Language');
mysql> insert into DemoTable(Name,Quote) values('David','Hibernate and spring is a framework');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)
以下是显示来自MySQL表的随机数的查询-
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)