SQLServerはVarcharを日時に変換します

SELECT CONVERT(Datetime, '2011-09-28 18:01:00', 120) -- to convert it to Datetime

SELECT CONVERT( VARCHAR(30), @date ,105) -- italian format [28-09-2011 18:01:00]
+ ' ' + SELECT CONVERT( VARCHAR(30), @date ,108 ) -- full date [with time/minutes/sec]