Day: April 4, 2014

Find database last access date via powershell

Bit of misnomer, it’s still using SQL executed via the dm_db_index_usage_stats dmv to get the last user seek\scan\lookup\update column to determine the last access time, but still a good script to get a list of the last usage dates for all your databases on all your servers.  Also includes the last server restart time, as the dm_db_index_usage_stats resets upon server restart.  Use at your own risk.

[void][reflection.assembly]::LoadWithPartialName("Microsoft.SqlServer.ConnectionInfo")
[void][reflection.assembly]::LoadWithPartialName("Microsoft.SqlServer.SmoEnum")
[void][reflection.assembly]::LoadWithPartialName("Microsoft.SqlServer.Smo")

$servers = Get-Content c:\Servers.txt

$outputs = @();

$lastAccessSQL = "
SELECT 
	DB_NAME(database_id) AS DatabaseName,
	COALESCE(
		MAX(last_user_seek),
		MAX(last_user_scan),
		MAX(last_user_lookup),
		MAX(last_user_update),
		'1/1/1900') AS LastAccessDate,
		(SELECT create_date FROM sys.databases WHERE name = 'tempdb') AS LastServerRestart
FROM
	sys.dm_db_index_usage_stats
WHERE DB_NAME(database_id) NOT IN('tempdb', 'master', 'msdb')
GROUP BY database_id
ORDER BY DatabaseName
"

$servers | %{
	$srvName = $_
	$srvConn = New-Object "Microsoft.SqlServer.Management.Common.ServerConnection"
	$srvConn.ServerInstance = $srvName

	$dr = $srvConn.ExecuteReader($lastAccessSQL)

	while($dr.Read()){
		$output = New-Object -TypeName PSObject -Property @{
		    ServerName = $srvName
		    DatabaseName = $dr.GetString(0)
			LastAccessDate = $dr.GetDateTime(1)
			ServerLastRestart = $dr.GetDateTime(2)
		}
		$outputs += $output
	}
	
}
$outputs | SELECT ServerName, DatabaseName, LastAccessDate, ServerLastRestart | Out-GridView