DBA should keep a list of tables which are not being used / referenced by anyone in last few weeks. At times, we come up with a requirement where developer asks, can I have list of unused tables or “Can you tell me the tables which are not being used in last one month”

Script to find out When the table was last accessed since the SQL Services were running

<pre class="brush: plain">
WITH LastActivity (ObjectID, LastAction)
AS
(
SELECT object_id AS TableName, Last_User_Seek as LastAction
FROM sys.dm_db_index_usage_stats u
WHERE database_id = db_id(db_name())
UNION
SELECT object_id AS TableName,last_user_scan as LastAction
FROM sys.dm_db_index_usage_stats u
WHERE database_id = db_id(db_name())
UNION
SELECT object_id AS TableName,last_user_lookup as LastAction
FROM sys.dm_db_index_usage_stats u 
WHERE database_id = db_id(db_name())
)
SELECT OBJECT_NAME(so.object_id)AS TableName,
MAX(la.LastAction)as LastSelect
FROM
sys.objects so
LEFT JOIN LastActivity la
ON so.object_id = la.ObjectID
WHERE so.type = 'U'
AND so.object_id &gt; 100   --returns only the user tables.Tables with objectid&lt;100 are systables.
GROUP BY OBJECT_NAME(so.object_id)
ORDER BY OBJECT_NAME(so.object_id)
</pre>

Published under: SQL Server Tips ·  ·  ·  ·