I don't think when a statsitic has been updated/created is exposed;
however, you can use a formulat to determine if any existing statistics ned to be updated ro not;
I slapped this example together a long time ago (it's using sysindexes instead of sys.indexes Sorry Gail!)
the idea behind it is any table with 1000 rows having been modified is worth of a statistics update, and depedning on hte size fo the table, more often than the default of 20% of the rows; big tables often need statsitics updated more often than that.
see if this helps?
--The Analysis: my crappy assumptions:
--UPDATE STATISTICS dbo.GMPVDET
--tables under 1000 rows, I'll leave then at 20%
--tables with more rows than that, I'll use an arbitrary sliding scale formula.
--formula to be modified based on analysis
SELECT X.*,
ISNULL(CASE
WHEN X.[Total Rows]<=1000
THEN
CASE
WHEN [Percent Modified] >=20.0
THEN 'UPDATE STATISTICS ' + [Schema Name] + '.' + [Table Name] + ' WITH ALL, FULLSCAN --20% Small Table Rule'
END
WHEN [Percent Modified] = 100.00
THEN 'UPDATE STATISTICS ' + [Schema Name] + '.' + [Table Name] + ' WITH ALL, FULLSCAN --100% No real Stats Rule'
--WHEN X.[Rows Modified] > 1000
--THEN 'UPDATE STATISTICS ' + [Schema Name] + '.' + [Table Name] + ' WITH ALL, FULLSCAN --1000 Rows Modified Rule'
ELSE
CASE
WHEN X.[Total Rows] > 1000000000 --billion rows
THEN CASE
WHEN [Percent Modified] > 0.1
THEN 'UPDATE STATISTICS ' + [Schema Name] + '.' + [Table Name] + ' WITH ALL, FULLSCAN -- 1B Big Table Rule'
END
WHEN X.[Total Rows] > 100000000 --hundred million rows
THEN CASE
WHEN [Percent Modified] > 1.0
THEN 'UPDATE STATISTICS ' + [Schema Name] + '.' + [Table Name] + ' WITH ALL, FULLSCAN -- 100M Big Table Rule'
END
WHEN X.[Total Rows] > 10000000 --ten million rows
THEN CASE
WHEN [Percent Modified] > 2.0
THEN 'UPDATE STATISTICS ' + [Schema Name] + '.' + [Table Name] + ' WITH ALL, FULLSCAN -- 10M Big Table Rule'
END
WHEN X.[Total Rows] > 1000000 --million rows
THEN CASE
WHEN [Percent Modified] > 5.0
THEN 'UPDATE STATISTICS ' + [Schema Name] + '.' + [Table Name] + ' WITH ALL, FULLSCAN -- 1M Big Table Rule'
END
WHEN X.[Total Rows] > 100000 --hundred thousand rows
THEN CASE
WHEN [Percent Modified] > 10.0
THEN 'UPDATE STATISTICS ' + [Schema Name] + '.' + [Table Name] + ' WITH ALL, FULLSCAN -- 100K Big Table Rule'
END
WHEN X.[Total Rows] > 10000 --ten thousand rows
THEN CASE
WHEN [Percent Modified] > 20.0
THEN 'UPDATE STATISTICS ' + [Schema Name] + '.' + [Table Name] + ' WITH ALL, FULLSCAN -- 10K Big Table Rule'
END
END
END,'') AS [Statistics SQL]
FROM (
SELECT DISTINCT
DB_NAME() AS [Database],
S.name AS [Schema Name],
T.name AS [Table Name],
I.rowmodctr AS [Rows Modified],
P.rows AS [Total Rows],
CASE
WHEN I.rowmodctr > P.rows
THEN 100
ELSE CONVERT(decimal(8,2),((I.rowmodctr * 1.0) / P.rows * 1.) * 100.0)
END AS [Percent Modified]
FROM
sys.partitions P
INNER JOIN sys.tables T ON P.object_Id = T.object_id
INNER JOIN sys.schemas S ON T.schema_id = S.schema_id
INNER JOIN sysindexes I ON P.object_id = I.id
WHERE P.index_id in (0,1)
AND I.rowmodctr > 0
) X
WHERE [Rows Modified] > 1000
ORDER BY [Rows Modified] DESC
Lowell