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)
热门推荐
10 小侄过生日祝福语简短
11 小店营业的祝福语简短
12 担任老师的祝福语简短
13 饮料吧台祝福语简短大气
14 公司新春搞笑祝福语简短
15 高情商敬酒祝福语简短
16 婚礼祝福语新郎妹妹简短
17 教师答辩通过祝福语简短
18 生女孩红包简短祝福语
