--Approx. Statistics Last Update Date
SELECT NAME AS Stats
,STATS_DATE(object_id, stats_id) AS LastStatsUpdate
FROM sys.stats
WHERE NAME LIKE 'history_%'
ORDER BY LastStatsUpdate
/*
SELECT NAME AS Stats
,STATS_DATE(object_id, stats_id) AS LastStatsUpdate
FROM sys.stats
WHERE NAME LIKE 'campaign_%'
ORDER BY LastStatsUpdate
*/