如何在MySQL中随机排序查询结果并选择随机行？
要随机排序查询结果，请使用ORDERBYRAND()。语法如下-
select * from DemoTable1559 where yourColumnName IN(yourValue1,yourValue2,....N) order by rand() limit yourLimitValue;
让我们首先创建一个表-
mysql> create table DemoTable1559 -> ( -> EmployeeId int, -> EmployeeName varchar(20), -> EmployeeAge int -> );
使用插入命令在表中插入一些记录-
mysql> insert into DemoTable1559 values(101,'Bob',28); mysql> insert into DemoTable1559 values(102,'Robert',26); mysql> insert into DemoTable1559 values(103,'Sam',25); mysql> insert into DemoTable1559 values(104,'Mike',29); mysql> insert into DemoTable1559 values(105,'John',34); mysql> insert into DemoTable1559 values(106,'Carol',31);
使用select语句显示表中的所有记录-
mysql> select * from DemoTable1559;
这将产生以下输出-
+------------+--------------+-------------+ | EmployeeId | EmployeeName | EmployeeAge | +------------+--------------+-------------+ | 101 | Bob | 28 | | 102 | Robert | 26 | | 103 | Sam | 25 | | 104 | Mike | 29 | | 105 | John | 34 | | 106 | Carol | 31 | +------------+--------------+-------------+ 6 rows in set (0.00 sec)
以下是查询以对查询结果进行随机排序并选择随机行-
mysql> select * from DemoTable1559 where EmployeeId IN(101,103,106) order by rand() limit 3;
这将产生以下输出-
+------------+--------------+-------------+ | EmployeeId | EmployeeName | EmployeeAge | +------------+--------------+-------------+ | 101 | Bob | 28 | | 103 | Sam | 25 | | 106 | Carol | 31 | +------------+--------------+-------------+ 3 rows in set (0.00 sec)