Find out how long the sql server service has been running, from t-sql

Question

I\'d like if its possible to work out from inside sql server how long sql server has been running.

Would like to use this in conjunction with one of the DMV\'s for unuse

Answer 1

This simple query works for versions before SQL Server 2005 as well as recent ones:

SELECT
 crdate AS startup,
 DATEDIFF(s, crdate, GETDATE()) / 3600. / 24 AS uptime_days
FROM master..sysdatabases
WHERE name = 'tempdb'