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MySQL从列值中随机选择2个值？

2024-04-27 07:50:04 497

要随机选择，请使用ORDERBYRAND()。要仅选择2个值，请在MySQL中使用LIMIT2。让我们首先创建一个表-

mysql> create table DemoTable1815
     (
     Question text
     );

使用插入命令在表中插入一些记录-

mysql> insert into DemoTable1815 values('What is your name?');
mysql> insert into DemoTable1815 values('What is your college name?');
mysql> insert into DemoTable1815 values('What is your nick name?');
mysql> insert into DemoTable1815 values('What is your enemy name?');

使用select语句显示表中的所有记录-

mysql> select * from DemoTable1815;

这将产生以下输出-

+----------------------------+
| Question                   |
+----------------------------+
| What is your name?         |
| What is your college name? |
| What is your nick name?    |
| What is your enemy name?   |
+----------------------------+
4 rows in set (0.00 sec)

这是只随机选择2条记录的查询-

mysql> select * from DemoTable1815 order by rand() limit 2;

这将产生以下输出-

+----------------------------+
| Question                   |
+----------------------------+
| What is your college name? |
| What is your enemy name?   |
+----------------------------+
2 rows in set (0.00 sec)

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MySQL从列值中随机选择2个值？

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