Hola,
Las estadísticas de los objetos de la base de datos deben estar actualizadas para tomar la decisión correcta del optimizador de SQL Server.
Si las estadísticas de los objetos de la base de datos no están actualizadas, el optimizador de la base de datos de SQL Server tomará una decisión incorrecta para el plan de ejecución de la transacción.
Puede verificar todas las estadísticas de los objetos de la base de datos con la siguiente consulta.
SELECT object_name(si.[object_id]) AS [TableName] , CASE WHEN si.[stats_id] = 0 then 'Heap' WHEN si.[stats_id] = 1 then 'CL' WHEN INDEXPROPERTY ( si.[object_id], si.[name], 'IsAutoStatistics') = 1 THEN 'Stats-Auto' WHEN INDEXPROPERTY ( si.[object_id], si.[name], 'IsHypothetical') = 1 THEN 'Stats-HIND' WHEN INDEXPROPERTY ( si.[object_id], si.[name], 'IsStatistics') = 1 THEN 'Stats-User' WHEN si.[stats_id] BETWEEN 2 AND 1004 THEN 'NC ' + RIGHT('00' + convert(varchar, si.[stats_id]), 3) ELSE 'Text/Image' END AS [IndexType] , si.[name] AS [IndexName] , si.[stats_id] AS [IndexID] , CASE WHEN si.[stats_id] BETWEEN 1 AND 250 AND STATS_DATE (si.[object_id], si.[stats_id]) < DATEADD(m, -1, getdate()) THEN '!! More than a month OLD !!' WHEN si.[stats_id] BETWEEN 1 AND 250 AND STATS_DATE (si.[object_id], si.[stats_id]) < DATEADD(wk, -1, getdate()) THEN '! Within the past month !' WHEN si.[stats_id] BETWEEN 1 AND 250 THEN 'Stats recent' ELSE '' END AS [Warning] , STATS_DATE (si.[object_id], si.[stats_id]) AS [Last Stats Update] , no_recompute FROM sys.stats AS si WHERE OBJECTPROPERTY(si.[object_id], 'IsUserTable') = 1 and STATS_DATE (si.[object_id], si.[stats_id]) is not null AND (INDEXPROPERTY ( si.[object_id], si.[name], 'IsAutoStatistics') = 1 OR INDEXPROPERTY ( si.[object_id], si.[name], 'IsHypothetical') = 1 OR INDEXPROPERTY ( si.[object_id], si.[name], 'IsStatistics') = 1) ORDER BY [Last Stats Update] go