Knowing Index Fragmentation Query


The below query explains about fragmentation on each index on each table on a specific database.
Fragmentation and page count should be greater than 1000

USE DatabaseName
go
SELECT
B.name AS TableName
, C.name AS IndexName
, C.fill_factor AS IndexFillFactor
, D.rows AS RowsCount
, A.avg_fragmentation_in_percent
, A.page_count
FROM sys.dm_db_index_physical_stats(DB_ID(),NULL,NULL,NULL,NULL) A
INNER JOIN sys.objects B
ON A.object_id = B.object_id
INNER JOIN sys.indexes C
ON B.object_id = C.object_id AND A.index_id = C.index_id
INNER JOIN sys.partitions D
ON B.object_id = D.object_id AND A.index_id = D.index_id
WHERE C.index_id > 0
and A.avg_fragmentation_in_percent >30
order by A.avg_fragmentation_in_percent desc

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