To select a random row from a given table

--Create a table to store the users
CREATE TABLE users
(
uid int,
uname varchar(30)
)
GO

--Inserting 15 rows into the table users
SET NOCOUNT ON
INSERT [users] ([uid],[uname])VALUES(1,'Vyas Kondreddi')
INSERT [users] ([uid],[uname])VALUES(2,'Narayana Kondreddi')
INSERT [users] ([uid],[uname])VALUES(3,'Kondreddi')
INSERT [users] ([uid],[uname])VALUES(4,'Narayana Vyas Kondreddi')
INSERT [users] ([uid],[uname])VALUES(5,'Subhadra Jyothsna')
INSERT [users] ([uid],[uname])VALUES(6,'Geetha Madhuri Vungarala')
INSERT [users] ([uid],[uname])VALUES(7,'Sridhar Vungarala')
INSERT [users] ([uid],[uname])VALUES(8,'Vamsee Mohan')
INSERT [users] ([uid],[uname])VALUES(9,'Gopala Krishna Kondreddi')
INSERT [users] ([uid],[uname])VALUES(10,'Nagaja Devi Kondreddi')
INSERT [users] ([uid],[uname])VALUES(11,'Vijaya Madhuri Govindaraju')
INSERT [users] ([uid],[uname])VALUES(12,'Pamarthy Pradeep Kumar')
INSERT [users] ([uid],[uname])VALUES(13,'Pamarthy Harinath')
INSERT [users] ([uid],[uname])VALUES(14,'Vungarala Sathyanarayana')
INSERT [users] ([uid],[uname])VALUES(15,'Pamarthy Ramakrishna')
SET NOCOUNT OFF
GO

--Here is the piece of code to pick a user randomly.
--Run the following code repeatedly to see the results
DECLARE @mx int, @mn int
SELECT @mx = MAX(uid) FROM users
SELECT @mn = MIN(uid) FROM users
SELECT uid,uname [Lucky Winner is...] FROM users WHERE uid = ROUND(@mn + (RAND() * (@mx-@mn)),0)

Source: http://vyaskn.tripod.com