mysql>
mysql> SELECT RAND(UNIX_TIMESTAMP( )) AS rand1,
-> RAND(CONNECTION_ID( )) AS rand2,
-> RAND(UNIX_TIMESTAMP( )+CONNECTION_ID( )) AS rand3;
+--------------------+-------------------+-------------------+
| rand1 | rand2 | rand3 |
+--------------------+-------------------+-------------------+
| 0.0815259293481018 | 0.681954370515379 | 0.608259872168545 |
+--------------------+-------------------+-------------------+
1 row in set (0.00 sec)
mysql>