如何从 MySQL 数据库中选择一条随机记录?
mysqlmysqli database更新于 2024/8/10 13:00:17
为此，您可以使用 ORDER BY RAND LIMIT。让我们首先创建一个表 −
mysql> create table DemoTable1581 -> ( -> StudentId int NOT NULL AUTO_INCREMENT PRIMARY KEY, -> StudentName varchar(20) -> ); Query OK, 0 rows affected (1.34 sec)
使用 insert 命令在表中插入一些记录 −
mysql> insert into DemoTable1581(StudentName) values('Chris');
Query OK, 1 row affected (0.41 sec)
mysql> insert into DemoTable1581(StudentName) values('Bob');
Query OK, 1 row affected (1.58 sec)
mysql> insert into DemoTable1581(StudentName) values('Sam');
Query OK, 1 row affected (2.11 sec)
mysql> insert into DemoTable1581(StudentName) values('Mike');
Query OK, 1 row affected (0.55 sec)
mysql> insert into DemoTable1581(StudentName) values('Carol');
Query OK, 1 row affected (0.16 sec)
使用 select 语句显示表中的所有记录 −
mysql> select * from DemoTable1581;
这将产生以下输出 −
+-----------+-------------+ | StudentId | StudentName | +-----------+-------------+ | 1 | Chris | | 2 | Bob | | 3 | Sam | | 4 | Mike | | 5 | Carol | +-----------+-------------+ 5 rows in set (0.00 sec)
这是从 MySQL 数据库中选择随机记录的查询 −
mysql> select * from DemoTable1581 order by rand() limit 1;
这将产生以下输出 −
+-----------+-------------+ | StudentId | StudentName | +-----------+-------------+ | 4 | Mike | +-----------+-------------+ 1 row in set (0.07 sec)
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