To draw five winning entries at random from a table named drawing that contains contest entries, use RAND( ) i : RAND « Function « SQL / MySQL






  1. SQL / MySQL
  2. Function
  3. RAND

To draw five winning entries at random from a table named drawing that contains contest entries, use RAND( ) i

     
n combination with LIMIT
mysql>
mysql>
mysql> CREATE TABLE die
    -> (
    ->  n       INT
    -> );
Query OK, 0 rows affected (0.00 sec)

mysql>
mysql> INSERT INTO die (n) VALUES(1);
Query OK, 1 row affected (0.00 sec)

mysql> INSERT INTO die (n) VALUES(2);
Query OK, 1 row affected (0.00 sec)

mysql> INSERT INTO die (n) VALUES(3);
Query OK, 1 row affected (0.00 sec)

mysql> INSERT INTO die (n) VALUES(4);
Query OK, 1 row affected (0.00 sec)

mysql> INSERT INTO die (n) VALUES(5);
Query OK, 1 row affected (0.00 sec)

mysql> INSERT INTO die (n) VALUES(6);
Query OK, 1 row affected (0.00 sec)

mysql>
mysql> SELECT * FROM die;
+------+
| n    |
+------+
|    1 |
|    2 |
|    3 |
|    4 |
|    5 |
|    6 |
+------+
6 rows in set (0.00 sec)

mysql>
mysql> SELECT * FROM die ORDER BY RAND( ) LIMIT 5;
+------+
| n    |
+------+
|    2 |
|    6 |
|    1 |
|    4 |
|    5 |
+------+
5 rows in set (0.00 sec)

mysql>
mysql> drop table die;
Query OK, 0 rows affected (0.00 sec)








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