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How to order results of a query randomly & select random rows in MySQL?
To order results of a query randomly, use ORDER BY RAND(). The syntax is as follows −
select * from DemoTable1559 where yourColumnName IN(yourValue1,yourValue2,....N) order by rand() limit yourLimitValue;
Let us first create a table −
mysql> create table DemoTable1559 -> ( -> EmployeeId int, -> EmployeeName varchar(20), -> EmployeeAge int -> ); Query OK, 0 rows affected (1.22 sec)
Insert some records in the table using insert command −
mysql> insert into DemoTable1559 values(101,'Bob',28); Query OK, 1 row affected (0.17 sec) mysql> insert into DemoTable1559 values(102,'Robert',26); Query OK, 1 row affected (0.16 sec) mysql> insert into DemoTable1559 values(103,'Sam',25); Query OK, 1 row affected (0.17 sec) mysql> insert into DemoTable1559 values(104,'Mike',29); Query OK, 1 row affected (0.17 sec) mysql> insert into DemoTable1559 values(105,'John',34); Query OK, 1 row affected (0.18 sec) mysql> insert into DemoTable1559 values(106,'Carol',31); Query OK, 1 row affected (0.19 sec)
Display all records from the table using select statement −
mysql> select * from DemoTable1559;
This will produce the following output −
+------------+--------------+-------------+ | 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)
Following is the query to order results of a query randomly and select random rows −
mysql> select * from DemoTable1559 where EmployeeId IN(101,103,106) order by rand() limit 3;
This will produce the following output −
+------------+--------------+-------------+ | EmployeeId | EmployeeName | EmployeeAge | +------------+--------------+-------------+ | 101 | Bob | 28 | | 103 | Sam | 25 | | 106 | Carol | 31 | +------------+--------------+-------------+ 3 rows in set (0.00 sec)
Updated on: 12-Dec-2019
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