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在MySQL数据库中选择两个随机行？

2024-05-18 02:45:07 407

使用RAND()和LIMIT子句在MySQL数据库中选择两个随机行-

select *from yourTableName order by rand() limit 2;

让我们首先创建一个表-

mysql>create table DemoTable
(
   Id int NOT NULL AUTO_INCREMENT PRIMARY KEY,
   ClientFirstName varchar(20)
);

使用插入命令在表中插入一些记录-

mysql>insert into DemoTable(ClientFirstName) values('Robert');
mysql>insert into DemoTable(ClientFirstName) values('Chris');
mysql>insert into DemoTable(ClientFirstName) values('Jace');
mysql>insert into DemoTable(ClientFirstName) values('James');
mysql>insert into DemoTable(ClientFirstName) values('David');
mysql>insert into DemoTable(ClientFirstName) values('John');
mysql>insert into DemoTable(ClientFirstName) values('Mike');

以下是使用select语句显示表中所有记录的查询-

mysql>select *from DemoTable;

这将产生以下输出-

+----+-----------------+
| Id | ClientFirstName |
+----+-----------------+
| 1  | Robert          |
| 2  | Chris           |
| 3  | Jace            |
| 4  | James           |
| 5  | David           |
| 6  | John            |
| 7  | Mike            |
+----+-----------------+
7 rows in set (0.00 sec)

以下是在MySQL数据库中选择两个随机行的查询。

mysql>select *from DemoTable order by rand() limit 2;

这将产生以下输出-

+----+-----------------+
| Id | ClientFirstName |
+----+-----------------+
| 4  | James           |
| 2  | Chris           |
+----+-----------------+
2 rows in set (0.00 sec)

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在MySQL数据库中选择两个随机行？

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