MySQL从列值中随机选择2个值？
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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