sql 检查索引碎片

Posted 2021-05-14

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----------------     Check Fragmentation in SQL Server     ----------------------
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-- For Specific Darabase, uncomment the USE USE [Database Name] just below
-- USE [Database Name]

SELECT Db_id()                    AS DbId, 
       Object_name(ind.object_id) AS TableName, 
       ind.name                   AS IndexName, 
       indexstats.index_type_desc AS IndexType, 
       indexstats.avg_fragmentation_in_percent, 
       indexstats.page_count      AS page_count 
FROM   sys.Dm_db_index_physical_stats(Db_id(), NULL, NULL, NULL, NULL) 
       indexstats 
       INNER JOIN sys.indexes ind 
               ON ind.object_id = indexstats.object_id 
                  AND ind.index_id = indexstats.index_id 
WHERE  indexstats.avg_fragmentation_in_percent > 30 

--You can specify the percent as you want 
ORDER  BY indexstats.avg_fragmentation_in_percent DESC;

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-- Get Current DatabaseID
-- SELECT DB_ID() DatabaseID;

-- Get Current DatabaseName
-- SELECT DB_NAME() DatabaseName;

-- Get DatabaseName from DatabaseID
-- SELECT DB_NAME(11) DatabaseID;

-- Get DatabaseID from DatabaseName
-- SELECT DB_ID('tempdb') DatabaseName;

-- Get all DatabaseName and DBID
-- SELECT name,database_id FROM sys.databases;

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